湖南省湘中名校教研教改联合体2017届高三上学期12月联考英语试题
湖南省湘中名校教研教改联合体2017届高三12月联考数学(理)答案

湖南省湘中名校教研教改联合体 2017届高三12月联考㊃数学(理)参考答案㊁提示及评分细则一㊁选择题:本大题共12小题,每小题5分㊂题号123456789101112答案A B A D D A B C A C B D 二㊁填空题:本题共4小题,每小题5分.13.-1 14.33 15.0 16.m >0或m <-4三㊁解答题:解答应写出文字说明㊁证明过程或演算步骤.17.解:(1)由a =2b s i n A ,根据正弦定理得s i n A =2s i n B s i n A ,ʑs i n B =12,由әA B C 为锐角三角形得B =π6.(5分)…………………………………………………………(2)c o s A +s i n C =c o s A +s i n (π-π6-A )=c o s A +s i n (π6+A )=c o s A +12c o s A +32s i n A =3s i n (A +π3).(8分)………………………………………………由әA B C 为锐角三角形知,A +B >π2,ʑπ3<A <π2. 则2π3<A +π3<5π6,ʑ12<s i n (A +π3)<32.(10分)……………………………………………………………………由此有32<3s i n (A +π3)<32ˑ3,ʑc o s A +s i n C 的取值范围为(32,32).(12分)…………18.解:(1)由A 表示事件 购买该商品的3位顾客中至少有1位采用1期付款 .知A -表示事件 购买该商品的3位顾客中无人采用1期付款 .P (A -)=(1-0.4)3=0.216,P (A )=1-P (A -)=1-0.216=0.784.(6分)………………………(2)η的可能取值为200元,250元,300元.P (η=200)=P (ξ=1)=0.4,P (η=250)=P (ξ=2)+P (ξ=3)=0.2+0.2=0.4,P (η=300)=1-P (η=200)-P (η=250)=1-0.4-0.4=0.2.(9分)…………………………η的分布列为:η200250300P 0.40.40.2E η=200ˑ0.4+250ˑ0.4+300ˑ0.2=240(元).(12分)…………………………………………19.解法一:(1)ȵP A ʅ平面A B C D ,B D ⊂平面A B C D .ʑB D ʅP A .又t a n øA B D =A D A B =33,t a n øB A C =B C A B =3.ʑøA B D =30ʎ,øB A C =60ʎ,ʑøA E B =90ʎ,即B D ʅA C (E 为A C 与B D 交点).又P A ɘA C ,ʑB D ʅ平面P A C .(6分)……………………………………………………………(2)过E 作E F ʅP C ,垂足为F ,连接D F .ɔ)页3共(页1第 案答考参卷数理㊃体合联改教研教校名中湘省南湖ʌȵD E ʅ平面P A C ,E F 是D F 在平面P A C 上的射影,由三垂线定理知P C ʅD F ,ʑøE F D 为二面角A -P C -D 的平面角.(8分)…………………………………………………又øD A C =90ʎ-øB A C =30ʎ,ʑD E =A D s i n øD A C =1,A E =AB s i n øA B E =3,又AC =43,ʑE C =33,P C =8.由R t әE F C ʐR t әP A C 得E F =P A ㊃E C P C =332.在R t әE F D 中,t a n øE F D =D E E F =239,由此可得余弦值为39331.ʑ二面角A -P C -D 的余弦值为39331.(12分)…………………………………………………解法二:(1)如图,建立坐标系,则A (0,0,0),B (23,0,0),C (23,6,0),D (0,2,0),P (0,0,4),ʑңA P =(0,0,4),ңA C =(23,6,0),ңB D =(-23,2,0),ʑңB D ㊃ңA P =0,ңB D ㊃ңA C =0,ʑB D ʅA P ,B D ʅA C .又P A ɘA C =A ,ʑB D ʅ平面P A C .(6分)…………………(2)设平面P C D 的法向量为n =(x ,y ,1),则ңC D ㊃n =0,ңP D ㊃n =0,又ңC D =(-23,-4,0),ңP D =(0,2,-4),ʑ-23x -4y =0,2y -4=0{,解得x =-433y {=2 ʑn =(-433,2,1).(8分)……………………………平面P A C 的法向量取为m =ңB D =(-23,2,0),(10分)………………………………………c o s <m ,n >=m ㊃n |m |+|n |=39331.ʑ二面角A -P C -D 的余弦值为39331.(12分)…………………………………………………20.解:(1)在C 1,C 2的方程中,令y =0,可得b =1,且A (-1,0),B (1,0)是上半椭圆C 1的左㊁右顶点.设C 1的半焦距为c ,由c a =32及a 2-c 2=b 2=1可得a =2,ʑa =2,b =1.(4分)………………(2)方法一:由(1)知,上半椭圆C 1的方程为y 24+x 2=1(y ȡ0).易知,直线l 与x 轴不重合也不垂直,设其方程为y =k (x -1)(k ʂ0),代入C 1的方程,整理得:(k 2+4)x 2-2k 2+x +k 2-4=0.(*)设点P 的坐标为(x P ,y P ),ȵ直线l 过点B ,ʑx =1是方程(*)的一个根.由求根公式,得x P =k 2-4k 2+4,从而y P =-8k k 2+4,ʑ点P 的坐标为(k 2-4k 2+4,-8k k 2+4).同理,由y =k (x -1)(k ʂ0),y =-x 2+1(y ɤ0{),得点Q 的坐标为(-k -1,-k 2-2k ).(8分)………………………依题意可知A P ʅA Q ,ʑңA P =2k k 2+4(k ,-4),ңA Q =-k (1,k +2).ɔ)页3共(页2第 案答考参卷数理㊃体合联改教研教校名中湘省南湖ʌȵA P ʅA Q ,ʑA P ㊃A Q =0,即-2k 2k 2+4[k -4(k +2)]=0,ȵk ʂ0,ʑk -4(k +2)=0,解得k =-83.(10分)…………………………………………………经检验,k =-83符合题意,故直线l 的方程为y =-83(x -1).(12分)…………………………方法二:若设直线l 的方程为x =m y +1(m ʂ0),比照方法一给分.21.解:(1)f (x )的定义域为(0,+ɕ).f ᶄ(x )=1+1x 2-a x =x 2-a x +1x2.令g (x )=x 2-a x +1,其判别式ә=a 2-4.(2分)…………………………………………………①当|a |ɤ2时,әɤ0,f ᶄ(x )>0,故f (x )在(0,+ɕ)上单调递增.②当a <-2时,ә>0,g (x )>0的两根都小于0,在(0,+ɕ)上,fᶄ(x )>0,故f (x )在(0,+ɕ)上单调递增.③当a >2时,ә>0,g (x )=0的两根为x 1=a -a 2-42,x 2=a +a 2-42,当0<x <x 1时,f ᶄ(x )>0;当x 1<x <x 2时,f ᶄ(x )<0;当x >x 2时,f ᶄ(x )>0,故f (x )分别在(0,x 1),(x 2,+ɕ)上单调递增,在(x 1,x 2)上单调递减.(6分)…………………(2)由(1)知,a >2.因为f (x 1)-f (x 2)=(x 1-x 2)+x 1-x 2x 1x 2-a (l n x 1-l n x 2),所以k =f (x 1)-f (x 2)x 1-x 2=1+1x 1x 2-a ㊃l n x 1-l n x 2x 1-x 2.又由(1)知,x 1x 2=1.于是k =2-a ㊃l n x 1-l n x 2x 1-x 2.(8分)…………………………………………若存在a ,使得k =2-a .则l n x 1-l n x 2x 1-x 2=1.即l n x 1-l n x 2=x 1-x 2.亦即x 2-1x 2-2l n x 2=0(x 2>1)(*)(10分)………………………………………………………再由(1)知,函数h (t )=t -1t -2l n t 在(0,+ɕ)上单调递增,而x 2>1,所以x 2-1x 2-2l n x 2>1-11-2l n 1=0.这与(*)式矛盾.故不存在a ,使得k =2-a .(12分)………………………………………………………………………………………………………选做题:22.解:(1)因为点A ,B ,C ,D 的极坐标为(2,π3),(2,5π6),(2,4π3),(2,11π6).所以点A ,B ,C ,D 的直角坐标为(1,3),(-3,1),(-1,-3),(3,-1).(5分)……………(2)设P (x 0,y 0):则x 0=2c o s φy 0=3s i n {φ(φ为参数)t =|P A |2+|P B |2+|P C |2+|P D |2=4x 20+4y 20+40=56+20s i n 2φɪ[56,76].(10分)………23.解:(1)由|x +a |<b 则-b -a <x <b -a ,所以-b -a =2且b -a =4.得a =-3,b =1.(5分)………………………………………………………………………………(2)-3t +12+3t =3(4-t +t )ɤ3(1+1)(4-t +t )=64-t +t =26.(10分)……………………………………………………………………………………………………当且仅当t =4-t 即t =2时取等号;如果采用平方或换元也可,参照给分.ɔ)页3共(页3第 案答考参卷数理㊃体合联改教研教校名中湘省南湖ʌ。
2017年长沙市高三英语联考试卷WORD版

绝密★启用前长沙市2017届高三年级统一模拟考试英语长沙市教科院组织名优教师联合命制总分:150分时量:120分钟第I卷第一部分听力(共两节,满分30分)做题时,先将答案标在试卷上,录音内容结束后,你将有两分钟的时间将试卷上的答案转涂到答题卡上。
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从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。
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例: How much is the shirt?A. £ 19.15.B. £ 9.18.C. £ 9.15.答案是C.1 . What are the speakers talking about? _A. The woman's favorite fruit.B. Different kinds of grapes.C. Ways of growing grapes.2. What can be learned about the man from the conversation?A. He usually plays sports now.B. He often played sports when young.C. He was poor at American football.3. When does the conversation most probably take place?A. Before a dinner.B. During a dinner.C. After a dinner.4. Now does the woman find her son's paper?A. It's well written.B. It's hard to understand.C. It needs rewriting.5. Why doesn't the man go to the laundry?A. It's too small.B. It's far awayC. It's not convenient.第二节(共15小题;每小题1.5分,满分22.5分)听下面5段对话或独自。
湖南省湘中名校教研教改联合体2017届高三上学期12月联考理数试题.

数学(理)第Ⅰ卷(选择题,共60分)一、选择题:本大题共12小题,每小题5分,在每小题给出的四个选项中,只有一项是符合题 目要求的.1.若复数()()11z m m m i =-+-是纯虚数,其中m 是实数,则1z=( ). A . i B .i - C .2i D .2i -2.已知集合{}(){}2|11120,|231,A x x x B x x n n Z =--<==+∈,则A B 等于( ).A .{}2B .{}2,8C .{}4,10D .{}2,4,8,10 3. 下列说法正确的是( ).A .a R ∈,“11a<”是“1a >”的必要不充分条件 B .“p 且q 为真命题”是“p 或q 为真命题” 的必要不充分条件C .命题“x R ∃∈,使得2230x x ++<”的否定是:“2,230x R x x ∀∈++>”D .命题p :“,s i n c o s 2x R x x ∀∈+≤,则p ⌝是真命题4. 利用独立性检验来考虑两个分类变量X 和Y 是否有关系时,通过查阅下表来确定“X 和Y 有关系”的可信度.如果 3.84k >,那么有把握认为“X 和Y 有关系”的百分比为( ).A . 5%B . 75%C . 99.5%D .95%5.已知向量((,,a x b x == ,若()2a b b +⊥ ,则a =( ).A .1B .26.设()[)[]21,11,1,2x f x x x ∈-=-∈⎪⎩,则()21f x dx -⎰的值为( ).A .423π+B .32π+C .443π+ D .34π+7.《九章算术》之后,人们学会了用等差数列的知识来解决问题,《张丘建算经》卷上第22题为:“今有女善织,日益功疾(注:从第2天开始,每天比前一天多织相同量的布),第一天织5尺布,现一月(按30天计)共织390尺布”,则从第2天起每天比前一天多织多少尺布.( ) A .12 B . 1629 C . 1631 D .8158. 一个凸多面体,其三视图如图,则该几何体体积的值为( ).A ...9 D .10 9.若正数,a b 满足:121a b +=,则2122a b +--的最小值为( ). A .2 BC .52 D.1+10.已知函数()()sin 2f x x ϕ=+,其中ϕ为实数,若()6f x f π⎛⎫≤⎪⎝⎭对x R ∈恒成立,且()2f f ππ⎛⎫> ⎪⎝⎭,则()f x 的单调递增区间是( ). A .(),36k k k Z ππππ⎡⎤-+∈⎢⎥⎣⎦B .(),2k k k Z πππ⎡⎤+∈⎢⎥⎣⎦C . ()2,63k k k Z ππππ⎡⎤++∈⎢⎥⎣⎦ D .(),2k k k Z πππ⎡⎤-∈⎢⎥⎣⎦11.已知函数()xf x e x =+,对于曲线()y f x =上横坐标成等差数列的三个点,,A B C ,给出以下判断:①ABC ∆一定是钝角三角形 ②ABC ∆可能是直角三角形 ③ABC ∆可能是等腰三角形 ④ABC ∆不可能是等腰三角形 其中,正确的判断是( ).A .①③B .①④C .②③D .②④ 12.已知函数()3213f x x ax bx c =-+++有两个极值点12,x x ,若()112x f x x <<,则关于x 方程()()()220f x af x b --=的实根个数不可能为( ). A .2 B .3 C .4 D .5第Ⅱ卷(非选择题,90分)二、填空题:本大题共4小题,每小题5分,共20分.13.若实数,x y 满足不等式组023010y x y x y ≥⎧⎪-+≥⎨⎪+-≤⎩,则2z y x =-的最小值是____________.14.设()()()25501251111x a a x a x a x +=+-+-++- ,则0125a a a a ++++= ____________.15.已知抛物线()220y px p =>的焦点为F ,ABC ∆的顶点都在抛物线上,且满足0FA FB FC ++= ,则111AB AC BCk k k ++=____________.16.定义在x R ∈上的函数()f x 在(),2-∞-上单调递增,且()2f x -是偶函数,若对一切实数x ,不等式()()2sin 2sin 1f x f x m ->--恒成立,则实数m 的取值范围为____________.三、解答题:本大题共6小题,共70分,解答应写出必要的文字说明,证明过程或演算步骤.17.(本小题满分12分)设锐角三角形ABC 的内角,,A B C 的对边分别为,,,2sin a b c a b A =. (1)求B 的大小;(2)求cos sin A C +的取值范围.18.(本小题满分12分)某商场经销某商品,根据以往资料统计,顾客采用的付款期数ξ的分布列为:商场经销一件该商品,采用1期付款,其利润为200元;分2期或3期付款,其利润为250元;分4期或5期付款,其利润为300元. η表示经销一件该商品的利润.(1)求事件A :“购买该商品的3位顾客中,至少有1位采用1期付款”的概率()P A ; (2)求η的分布列及期望E η. 19.(本小题满分12分)如图,在底面为直角梯形的四棱锥P ABCD -中,0//,90,PA AD BC ABC ∠=⊥平面,4,2,6ABC PA AD AB BC ====.(1)求证:BD ⊥平面PAC ; (2)求二面角A PC D --的余弦值. 20.(本小题满分12分)如图,曲线C 由上半椭圆()22122:10,0y x C a b y a b+=>>≥和部分抛物线()2:10C y x y =-+≤连接而成,1C 与2C 的公共点为,A B ,其中1C(1)求,a b 的值;(2)过点B 的直线l 与12,C C 分别交于点,P Q (均异于点,A B ),是否存在直线l ,使得以PQ 为直径的圆恰好过A 点,若存在,求出直线l 的方程;若不存在,请说明理由. 21.(本小题满分12分) 设函数()()1ln f x x a x a R x=--∈. (1)讨论()f x 的单调性;(2)若()f x 有两个极值点1x 和2x ,记过点()()()()1122,,,A x f x B x f x 的直线的斜率为k ,问:是否存在a ,使得2k a =-?若存在,求出a 的值,若不存在,请说明理由.请考生在第22、23题中任选一题作答,如果多做,那么按所做的第一个题记分. 22.(本小题满分10分)(选修4-4:坐标系与参数方程) 已知曲线1C 的参数方程是2cos 3sin x y ϕϕ=⎧⎨=⎩(ϕ为参数),以坐标原点为极点,x 轴的正半轴为极轴建立坐标系,曲线2C 的极坐标系方程是2ρ=,正方形ABCD 的顶点都在2C 上,且,,,A B C D 依逆时针次序排列,其中点A 的极坐标为2,3π⎛⎫⎪⎝⎭.(1)求点,,,A B C D 的直角坐标;(2)设P 为1C 上任意一点,求2222PA PB PC PD +++的取值范围. 23. (本小题满分10分)选修4-5:不等式选讲 已知关于x 的不等式x a b +<的解集为{}|24x x <<. (1)求实数,a b 的值;(2参考答案一、选择题二、填空题13. -1 14. 33 15.0 16. 2m <-或4m > 三、解答题17.解:(1)由2sin a b A =,根据正弦定理得sin 2sin sin A B A =,∴1sin 2B =, 由ABC ∆为锐角三角形得6B π=................................5分∴1sin 23A π⎛⎫<+<⎪⎝⎭..............................10分3Aπ⎛⎫<+<⎪⎝⎭cos sinA C+的取值范围为322⎛⎫⎪⎪⎝⎭...........12分18.解:(1)由A表示事件“购买该商品的3位顾客中无人采用1期付款”.知A表示事件“购买该商品的3位顾客中无人采用1期付款”.()()()()310.40.216,110.2160.784P A P A P A=-==-=-=....................6分(2)η的可能取值为200元,250元,300元,()()()()()()()()20010.4250230.20.20.4300120025010.40.40.2P PP P PP P Pηξηξξηξη=======+==+===-=-==--=.............................9分η的分布列为:2000.42500.43000.2240Eη=⨯+⨯+⨯=元.............................12分19.解法一:(1)∵PA⊥平面,ABCD BD⊂平面ABCD,∴BD PA⊥,又tan tan3AD BCABD BACAB AB∠==∠==∴0030,BAC60ABD∠=∠=,∴090AEB∠=,即BD AC⊥(E 为AC与BD交点).又PA AC,∴BD⊥平面PAC.............................6分(2)过E作EF PC⊥,垂足为F,连接DF.∵DE⊥平面,PAC EF是DF在平面PAC上的射影,由三垂线定理知PC DF⊥,∴EFD ∠为二面角A PC D --的平面角....................... 8分 又09030DAC BAC ∠=-∠=,∴sin 1DE AD DAC =∠=,sin AE AB ABE =∠=又AC =8EC ==,由Rt EFC Rt PAC ∆∆得PA EC EF PC ==. 在Rt EFD ∆中,tan DE EFD EF ∠==. ∴二面角A PC D --的余弦值为31.......................12分 解法二:(1)如图,建立坐标系,则()()()()()0,0,0,,,0,2,0,0,0,4A B C D P ,∴()()()0,0,4,,AP AC BD ===- ,∴0,0BD AP BD AC ==,∴,BD AP BD AC ⊥⊥,又PA AC A = ,∴BD ⊥平面PAC ..................6分(2)设平面PCD 的法向量为(),,1n x y =, 则0,0CD n PD n == ,又()()4,0,0,2,4CD PD =--=-,∴40240y y ⎧--=⎪⎨-=⎪⎩,解得2x y ⎧=⎪⎨⎪=⎩,∴2,13n ⎛⎫=- ⎪ ⎪⎝⎭....................8分平面PAC的法向量取为()2,0m BD ==-......................10分cos ,m n m n m n==+∴二面角A PC D --的余弦值为31.....................12分 20.解:(1)在12,C C 的方程中,令0y =,可得1b =,且()()1,0,1,0A B -是上半椭圆1C 的左、右顶点, 设1C 半焦距为c,由2c a =及2221a c b -==可得2a =,∴2,1a b ==...............4分(2)方法一:由(1)知,上半椭圆1C 的方程为()22104y x y +=≥, 易知,直线l 与x 轴不重合也不垂直,设其方程为()()10y k x k =-≠,代入1C 的方程,整理得:()22224240k x k x k +-++-=(*)设点P 的坐标为(),P P x y ,∵直线l 过点B ,∴1x =是方程(*)的一个根,由求根公式,得2244P k x k -=+,从而284P k y k -=+,∴点P 的坐标为22248,44k k k k ⎛⎫-- ⎪++⎝⎭, 同理,由()()()21010y k x k y x y =-≠⎧⎪⎨=-+≤⎪⎩,得点Q 的坐标为()21,2k k k ----.......8分 依题意可知AP AQ ⊥,∴()()22,4,1,24kAP k AQ k k k =-=-++ .∵AP AQ ⊥,∴0AP AQ = ,即()2224204k k k k --+=⎡⎤⎣⎦+, ∵0k ≠,∴()420k k -+=,解得83k =-...................10分 经检验,83k =-符合题意,故直线l 的方程为()813y x =--............12分 方法二:若设直线l 的方程为:()10x my m =+≠,比照方法一给分.21.解:(1)()f x 的定义域为()0,+∞,()2222111a x ax f x x x x -+'=+-=,令()21g x x ax =-+,其判别式24a ∆=-........................2分①当2a ≤时,()0,0f x '∆≤>,故()f x 在()0,+∞上单调递增,②当2a <-时,()0,0g x ∆>>的两根都小于0,在()0,+∞上,()0f x '>, 故()f x 在()0,+∞上单调递增,③当2a >时,()0,0g x ∆>=的两根为12x x ==, 当10x x <<时,()0f x '>;当12x x x <<时,()0f x '<;当2x x >时,()0f x '>, 故()f x 分别在()()120,,x x +∞,上单调递增,在()12,x x 上单调递减.............6分 (2)由(1)知,2a >. 因为()()()()1212121212ln ln x x f x f x x x a x x x x --=-+--, 所以()()1212121212ln ln 11f x f x x x k a x x x x x x --==+--- , 又由(1)知,121x x =.于是1212ln ln 2x x k a x x -=--....................8分若存在a ,使得2k a =-.则1212ln ln 1x x x x -=-.即1212ln ln x x x x -=-,亦即()222212ln 01x x x x --=>(*).....................10分 再由(1)知,函数()12ln h t t t t=--在()0,+∞上单调递增,而21x >, 所以222112ln 12ln101x x x -->--=.这与(*)式矛盾,故不存在a ,使得2k a =-.....12分选做题22.解:(1)因为点,,,A B C D 的极坐标为54112,,2,,2,,2,3636ππππ⎛⎫⎛⎫⎛⎫⎛⎫ ⎪ ⎪ ⎪ ⎪⎝⎭⎝⎭⎝⎭⎝⎭. 所以点,,,A B C D的直角坐标为(()(),,1,,1--.............5分 (2)设()00,P x y :则()002cos 3sin x y ϕϕϕ=⎧⎨=⎩为参数, []22222220044405620sin 32,52t PA PB PC PD x y ϕ=+++=++=+∈.........10分23.解:(1)由x a b +<,则b a x b a --<<-,所以2b a --=且4b a -=, 得3,1a b =-=..............................5分(2)≤=............................................10分=,即2t =时取等号;如果采用平方或换元也可,参照给分.。
湖南省湘中名校教研教改联合体2017届高三上学期12月联考试题 物理

湖南省湘中名校教研教改联合体”2017届高三12月联考物理考生注意:1. 本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分.满分110分,考试时间90分钟.2.考生作答时,请将答案答在答题卡上.第Ⅰ卷每小题选出答案后,用2B铅笔把答题卡上对应题目的答案标号涂黑;第Ⅱ卷请用直径0.5毫米黑色墨水签字笔在答题卡上各题的答题区域内作答,超出答题区域书写的答案无效,在试题卷、草稿纸上答题无效。
3.命题范围恒定电流之前内容(含恒定电流占、3-5) 80%,后面内容占20%( 3-3,3-4).第Ⅰ卷(选择题,共50分)一、选择题(本题共10小题,每小题5分。
在每小题给出的4个选项中,第1-6题只有一项符合题目要求,第7-10题有多项符合题目要求。
全部选对得5分,选对但不全得3分,有选错的得0分。
)1.如图所示,很小的木块由静止开始从斜面下滑,经时间t后进入一水平面,两轨道之间用长度可忽略的圆弧连接,再经2t时间停下,关于木块在斜面上与在水平面上位移大小之比和加速度大小之比,下列说法正确的是A.1︰2 2︰1B. 1︰2 1︰2C. 2︰1 2︰1D.2︰1 1︰22.有一段通电直导线,长为0.01m,电流为5A,把它放入磁场中某一位置,受到的磁场力大小为0.1N,则该处的磁感应强度B 的大小为A. B=1TB. B=2TC.B≥2TD.B≤2T3.2016年8月16日01时40分,由我国研制的世界首颗量子科学试验卫星“墨子号”在酒泉卫星发射中心用长征二号丁运载火箭成功发射升空.它的成功发射和在轨运行,不仅将有助于我国广域量子通信网络的构建,服务于国家信息安全,它将开展对量子力学基本问题的空间尺度试验检验,加深人类对量子力学自身的理解,关于量子和量子化,下列说法错误..的是A.玻尔在研究原子结构中引进了量子化的概念B.普朗克把能量子引入物理学,破除了“能量连续变化”的传统观念C..光子的概念是爱因斯坦提出的D.光电效应实验中的光电子,也就是光子4.天宫二号空间实验室于2016年9月15日成功发射;2016年10月发射神州十一号飞船,搭 乘2名宇航员,与天宫二号对接后完成航天员中期驻留试验.对于神州十一号飞船、天宫二 号及二者的对接,下列说法正确的是 A. 神州十一号飞船发射过程中,航天员一直处于失重状态 B.天宫二号如果受到较大的阻力作用,则轨道半径将增大C.神州十一号飞船与天宫二号在同一轨道加速后可以实现对接D.神州十一号飞船与天宫二号对接后正常运行时,二者动能和引力势能之和一定守恒5.如图甲所示,在光滑的水平面上,质量分别为m 和M(m ︰M=1︰2)的物块A 、B 用轻弹簧相连.当用水平力F 作用于B 上且两 物块共同向右加速运动时,弹簧的伸长量为1x ;当用同样大小的力F 竖直加速提升两物块时(如图乙所示),弹簧的伸长量为2x .不计空气阻力.则1x ︰2x . 等于A.1︰1B.1︰2C.2︰1D.2︰36.如图所示,质量为m 的小物块从固定的半圆形槽内与圆心等高的位置P 点无初速度释放, 先后经过A 、B 、C 三点,小物块到达左侧C 点时速度为零.B 点是最低点,半圆形槽的半径为R,A 点与C 点等高,A 点与B 点高度差为2R重力加速度为g,则A.小物块从P 点运动到C 点的过程,重力对小物块做的功大于小物块克服摩擦力做的功B.小物块第一次从A 点运动到C 点的过程,重力对小物块做的功大于小物块克服摩擦力做的功C.小物块只能到达C 点一次,但能经过A 点两次D.小物块第一次过B 点时,对槽的压力一定大于2mg7.如图所示,在一绝缘斜面C 上有一带正电的小物体A 处于静止状态,现将一带正电的小球B 沿以A 为圆心的圆弧缓慢地从P 点转到A 正上方的Q 点处,已知P 、A 在同一水平线上,且 在此过程中物体A 和斜面C 始终保持静止不动,A 、B 可视为质点.关于此过程,下列说法正 确的是A.物体A 受到摩擦力一直减小B.物体A 受到斜面的支持力先增大后减小C.地面对斜面C 的支持力先增大后减小D.地面对斜面C 的摩擦力一直减小8.如图甲所示,质量为1kg 的小物块以初速度v0=11m/s 从θ=53° 的固定斜面底端先后两次滑上斜面,第一次对小物块施加一沿斜面向上的恒力F,第二次不 施加力.图乙中的两条线段a 、b 分别表示施加力F 和无F 时小物块沿斜面向上运动的v-t 图象,不考虑空气阻力,g=10m/s2,下列说法正确的是A.恒力F 大小为1NB.物块与斜面间动摩擦因数为0.6C.有恒力F 时,小物块在上升过程中产生的热量较少D.有恒力F 时,小物块在上升过程中机械能的减少9. 某质点在几个恒力的作用下做匀速直线运动.现突然将与速度反方向的一个力水平旋转某一角度α(α≠0,α≠π),则以后质点运动的情况是A. 质点的速度一定越来越大B. 质点的速度一定越来越小C. 质点的速度大小可能不变D. 质点一定做匀变速曲线运动10.如图甲是液化汽燃气灶的电子点火装置原理图,一节1.5V的干电池通过晶体管电路的控制,产生脉动的电压加在变压器原线圈n1 的两端,并在变压器的铁芯中激发磁感强度随时,如图乙所示(磁场方向顺时针时为正方向).变压器铁芯横截面积为S=0.82cm.副线圈n的一端连接燃气灶的金属外壳E,另一端通过二2极管与钢A相连,调整A 与E 的间距,使A 与E 间的电压达到5000V 以上时,AE 间就会引发电火花而点燃燃气.以下说法正确的是A.变压器副线圈匝数至少要1250匝才能点火B.变压器副线圈匝数至少要5000匝才能点火C.若将电极A改为金属板而其他不改动,则更不容易引发电火花D.若将电极A改为金属板而其他不改动,则更容易引发电火花第Ⅱ卷(非选择题共60分)二、实验题:(每空3分,共15分)11.(9分)气垫导轨是研究与运动有关的实验装置,也可以用来研究功能关系.如图甲所示,在气垫导轨的左端固定一轻质弹簧,轨道上有一滑块A紧靠弹簧但不连接,滑块的质量为m.(1) 用游标卡尺测出滑块A上的挡光片的宽度,读数如图乙所示,则宽度d=___ cm(2)利用该装置研究弹簧对滑块做功的大小;某同学打开气源,调节装置,使滑块可以静止悬浮在导轨上,然后用力将滑块A压紧到P点,释放后,滑块A上的挡光片通过光电门的时间为△t,则弹簧对滑块所做的功为___(用题中所给字母表示).(3)利用该装置测量滑块与导轨间的动摩擦因数;关闭气源,仍将滑块A由P点释放,当光电门到P点的距离为x时,测出滑块A上的挡光片通过光电门的时间为t,移动光电门,每次将滑块A由P点释放,测出多组数据(滑块都能通过光电门),并绘出图象.如图丙所示,已知该图线斜率的绝对值为k,则滑块与导轨间的滑动摩擦因数为____(重力加速度用g表示).12.(6分)在学习了伏安法测电阻之后,某课外活动小组想通过图甲所示的实验电路测定一个阻值约为几十欧的电阻R x的阻值。
湖南省三校高二英语12月联考试题

2017年下学期高二年级联考英语试题总分:150分时量:120分钟考试时间:2017年12月12日第Ⅰ卷第一部分听力(共两节,满分30分)第一节 (共5小题:每小题1.5分,满分7.5分)听下面5段对话。
每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。
听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。
每段对话仅读一遍。
1. What will the man do first?A. Fix a bike.B. Have a Coke.C. Clean the windows.2. How is the woman learning Chinese?A. On the radio.B. On television.C. On the Internet.3. What has made the man so upset?A. The ugly walls.B. His kids.C. The business.4. When will the man leave for Tianjin?A. At 5:00.B. At 5:30.C. At 6:00.5. What are the speakers mainly talking about?A. A storm.B. A tree.C. A house.第二节(共15小题;每小题1.5分,满分22.5分)听下面5段对话或独白。
每段对话或独白后有几个小题,从每题所给的A,B,C三个选项中选出最佳选项,并标在试卷的相应位置。
听每段对话或独白前,你将有时间阅读各个小题,每小题5秒钟;听完后,各小题将给出5秒钟的作答时间。
每段对话或独白读两遍。
请听第6段材料,回答第6至7题。
6. How many people did the woman travel with?A.Two.B. Three.C. Four.7. Where did the woman not go?A. China.B. Singapore.C. Malaysia.请听第7段材料,回答第8至9题。
2017届湖南省长沙市高三上学期统一模拟考试(期末)英语试题

绝密★启用前长沙市2017届高三年级统一模拟考试英语长沙市教科院组织名优教师联合命制总分:150分时量:120分钟第I卷第一部分听力(共两节,满分30分)做题时,先将答案标在试卷上,录音内容结束后,你将有两分钟的时间将试卷上的答案转涂到答题卡上。
第一节(共5小题;每小题1.5分,满分7.5分)听下面5段对话,每段对话后有一个小题。
从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。
听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。
每段对话仅读一遍。
例: How much is the shirt?A. £ 19.15.B. £ 9.18.C. £ 9.15.答案是C.1 . What are the speakers talking about? _A. The woman's favorite fruit.B. Different kinds of grapes.C. Ways of growing grapes.2. What can be learned about the man from the conversation?A. He usually plays sports now.B. He often played sports when young.C. He was poor at American football.3. When does the conversation most probably take place?A. Before a dinner.B. During a dinner.C. After a dinner.4. Now does the woman find her son's paper?A. It's well written.B. It's hard to understand.C. It needs rewriting.5. Why doesn't the man go to the laundry?A. It's too small.B. It's far awayC. It's not convenient.第二节(共15小题;每小题1.5分,满分22.5分)听下面5段对话或独自。
高中英语真题:2017届高三英语12月份高考模拟试题_1

2017届高三英语12月份高考模拟试题第Ⅰ卷(选择题105分)第一部分:听力(共两节,满分30分)第一节(共5小题;每小题1.5分,满分7.5分)1.What do we know about the woman?A.She often plays chess.B.She is poor in playing chess. C .She hates playing chess.2.What does the man mean?A.The woman has got a lot of shoes.B.He will buy the wo man a pair of shoes.C.The woman's shoes match her new dress well.3.What can we learn from the conversation?A.The woman is a firefighter.B.The speakers had a barbec ue.C.The man is too lazy to tidy up.4.What are the speakers mainly talking about?A.Where Tom's family moved.B.What Tom's new school is like.C.Why Tom went to a new school.5.What will the weather be like?A.Hot.B.Warm.C.Cool.第二节(共15小題;每小题1.5分,满分22.5分)听第6段材料,回答第6~7题。
6.How does the Ultraphone create documents?A.By reading lips.B.By reading fingers.C.By reading s ounds.7.How does the man feel about the woman's words?A.Impatient.B.Unbelievable.C.Confused.听第7段材料,回答第8~9题。
湖南省三湘名校教育联盟2017届高三第三次大联考英语试题含答案

第Ⅰ卷(选择题共100分)第一部分听力(共两节,满分30分)第一节(共5小题;每小题1.5分,满分7.5分)听下面5段对话。
每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。
听完每段对话后,你都有10秒钟的时间回答有关小题和阅读下一小题。
每段对话仅读一遍。
1.What will the man do this evening?A.To go to the concert.B.To meet Jac.C.To write his essay.2.Why will the man get home late?A.Because he will meet his friend.B.Because he has just taen a new project.C.Because there is a traffic jam.3.What is the boy doing?A.He is having a class.B.He is doing his own homewor.C.He is doing Jim's homewor.4.Which line should the man tae?A.Line 6.B.Line 16.C.Line 60.5.Where did the conversation tae place?A.In the hospital.B.At the hairdresser's.C.At the butcher's.第二节(共15小题;每小题1.5分,满分22.5分)听下面5段对话或对白,每段对话或独白后有几个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置,听每段对话或独白前,你将有时间阅读各个小题。
每小题5秒钟;听完后,各小题给出5秒钟的作答时间。
每段对话或独白读两遍。
听第6段材料,回答第6、7题。
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机密★启用前“湖南省湘中名校教研教改联合体”2017届高三12月联考英语命题单位:湘潭县一中命题人:王素云廖剑英2016.12考生注意:1. 本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分。
满分150分,考试时间120分钟。
2.考生作答时,请将答案写在答题卡上。
第Ⅰ卷每小题选出答案后,用2B 铅笔把答题卡上对应题目的答案标号涂黑;第Ⅱ卷请用直径0.5 毫米黑色墨水签字笔在答题卡上各题的答题区域内作答,超出答题区域书写的答案无效,在试题卷、草稿纸上答题无效。
3.命题范围:高考全部范围第I卷(选择题共100分)第一部分听力(共两节,满分30分)回答听力部分时,请先将答案标在试卷上,听力部分结束前,你将有两分钟的时间将你的答案转涂到答题卡上。
第一节(共5 小题;每小题1.5 分,满分7.5 分)听下面5 段对话,每段对话后有一个小题。
从题中所给的A,B,C 三个选项中选出最佳选项,并标在试卷的相应位置。
听完每段对话后,你都有10 秒钟的时间来回答有关小题和阅读下一小题。
每段对话仅读一遍。
1.What does the man want to do?A. Reserve a cheap hotel.B. Go to Mexico on business.C. Relax and enjo y himself.2.What will the woman get?A. Carpet cleaner.B. A paper towel.C. A glass of wine.3.Who is the woman?A. She’s a teacher.B. She’s a student.C. She’s an assistant teacher.4.Where are the speakers heading?A. To a swimming pool.B. To the beach.C. To a restaurant.5.Why is the museum important?A. It’s a museum for old art.B. It will be built on a small island.C. It’s the first of its kind in Indonesia.第二节(共15小题;每小题1.5分,满分22.5分)听下面5段对话或独白。
每段对话或独白后有几个小题,从题中所给的A、B、C 三个选项中选出最佳选项,并标在试卷的相应位置。
听每段对话或独白前,你将有时间阅读各个小题,每小题5秒钟;听完后,各小题将给出5秒钟的作答时间。
每段对话或独白读两遍。
听第6段材料,回答第6、7题。
6.How much does an entrance ticket cost?A. Two dollars.B. Five dollars.C. Seven dollars.7.How does the woman pay?A. In cash.B. By check.C. By credit card.听第7段材料,回答第8、9题。
8.Where did the tomato sauce come from?A. A local farm.B. A store only five miles away.C. The man’s own tomatoes.9.What does the woman think of cooking?A. She enjoy sit.B. She doesn’t have the patience for it.C. It makes her feel creative.听第8段材料,回答第10至12题。
10.What is the relationship between the speakersA. Interviewer and interviewee.B. Husband and wife.C. Neighbors.11.Where did the man go to college?A. In Washington.B. In Texas.C. In Nebraska.12.What is the woman’s job?A. She is a computer programmer.B. She is a banker.C. She is an artist.听第9段材料,回答第13至16题。
13.What did Fitbit say about the recentstudy?A. It was false.B. It hurt their business.C. They had no comment.14.When does the man use his Fitbit?A. Only when he’s exercising.B. During the daytime.C. All the time.15.What does the man think of his Fitbit?A. It’s sometimes uncomfortable to wear.B. It isn’t useful.C. It’s a good value.16.How does the woman sound? .A. InterestedB. Bored.C. Upset听第10段材料,回答第17至20题。
17.What is the speaker mainly talking about?A. A free lesson website for teachers.B. A search engine.C. A language program.18.How many people use Duolingo currently?A. Over one hundred million.B. A few hundred thousand.C. Several thousand.19.Where is Luis von Ahn from?A. Switzerland.B. Guatemala.C. Costa Rica.20.How was Duolingo originally funded?A. By big websites.B. By an actor.C. By schools.第二部分阅读理解(共两节,满分40分)第一节(共15小题;每小题2分,满分30分) 阅读下列短文,从每题所给的四个选项(A、B、C 和D)中选出最佳选项,并在答题卡上将该项涂黑。
ASculpture in the Close— a Free Exhibition of Contemporary Sculptors 22June — 21SeptemberJesus CollegeJesus College is displaying contemporary British and Irish sculptors in a free outside exhibition in Cambridge this summer.Sculptors exhibiting this year include Royal Academy Award winner James Capper, who is just 27 years old. He is appearing alongside previous Turner Prize winners Roger Hiorns and Lucy Skaer, as well as famous sculptors Thomas Houseago and Eva Rothschild.The free exhibition is open to the public every day between 22 June to 21 September, 11 am — 8pm.Guidebooks are available at Jesus Colege’s Porters’ Lodge. For more details please visit .River Stars Reindeer(驯鹿):Imaging Evenki and Orochen Communities of Siberia 7July — 27SeptemberMuseum of Archaeology and AnthropologyIn 1915,the Russian anthropologist Sergei Shirokogoroff and his wife Elizabeth were invited to the forests of the Amur River to study the indigenous(土著的)Eveki and Orochen peoples. Fourteen years later, Cambridge’s graduate Ethel Lindgren went in search of these “little known tribes”, as they were considered to be “fast dying out”. Together they amassed a considerable collection of 26000 culturally and historically important photographs, the majority of which have never been seen, until now.From the excitement of recognizing faces, to the beauty of the reindeer, or the heated debates about what is happening in the photographs, this exhibition is about the reconnection of these communities with their images, their histories, and their stories.The exhibition costs nothing and is open to the public every day from 7July until 27 September,10:30am — 4:30pm.Website Email:admin@.Telephone:01223333516.21.What do you know about James Capper?A. A Turner Prize winner.B. A very young sculptor.C. A famous photographer.D. A Cambridge’s graduate.22.How long does this year’s Sculpture in the Closelast?A. For one week.B. For two weeks.C. For three months.D. For five months.23.Who are most likely to visit the second exhibition?A. People interested in music.B. Visitors liking the paintings.C. Teenagers studying science.D. Students majoring in history.24.What do the two exhibitions have in common?A. Visitors can see the exhibitions for free.B. They are held in the same museum.C. They must be booked in advance.D. They are held at the same time.BIt wouldn’t be an exaggeration to say that the United States has entered a brand new age, because Donald Trump, the country’s 45th president, is very different from any president before him.Unlike Hilary Clinton, his opponent, and most previous US presidents, who entered the election after years of being politicians,Trump,70,was a New York real estate (房地产) businessman. And he was not a presidential candidate who worked hard to keep a perfect public image of a man always caring, fair and intelligent.Instead, Trump has a reputation of being short-tempered, self-centered and hateful toward those who disagree with him. He also blames immigrants, both from Latin America and the Middle East.But to his supporters, Trump is not a typical politician, which is actually one of his advantages.“We have seen our country take a downturn in the eyes of the world. We need to go in a different direction,” Binyomin Weisswasser,39,from Chicago, told the Chicago Tribune.“ Trump’s not a politician ...I like that he is not always politically correct and speaks his mind. It gives me the feeling that what you see is what you get. You may not like it, but you know what it is.”Interestingly, many who voted for Trump actually followed the “lesser of two evils” principle — one that people use when faced with picking from two unpleasant options — simply be cause they didn’t think Clinton was a better choice.“He’s the candidate I disagree less with,” Jack Stu cky, 20, a student at Northwestern University, told the Chicago Tribune.“ I don’t think I’d say Trump is going to be the best president ever, but I di d think he’d be better than Hilary Clinton.”25.What is the main purpose of the passage?A. To predict what changes Donald Trump would bring to the US.B. To report on people’s different reactions to Trump’s win in the election.C. To explore the advantages Donald Trump had over Hilary Clinton.D. To analyze Donald Trump and the reasons for his victory in the presidential election.26. According to the text, compared with Hilary Clinton, Donald Trump _______.A. cares more about keeping his public image perfectB. is believed to be more experienced and flexible in politicsC. is considered more straight for ward and trustworthyD. holds a more tolerant attitude toward immigrants27.According to the text, many who voted for Trump .A. believed he would be the best president everB. expected him to lead the US out of its downturnC. were convinced that he would be always politically correctD. felt that he was more fair and intelligent than Hilary ClintonCWhenever seeing a button, we are eager to press it because we know something will happen. This is true in most cases, for example on a doorbell and on the “on/off” button on the TV. But some buttons are actualy fake, like the “close” button on an elevator.Many people like pressing the “close” button because they don’t have the patience to wait for the elevator doors to shut. But according to Karen W. Penafiel , executive director of the US’ National Elevator Industry Inc., elevators’ “close” buttons are a complete trap, at least in the US — the doors will not close any faster no matter how hard you p ress.In the 1990s, the Americans with Disabilities Act was passed in the US, making sure all elevators stayed open long enough for people with d isabilities to enter. Only US firefighters and maintenance workers can use the buttons to speed up thedoor-closing process if they have a code or special keys.But to normal elevator riders, the buttons aren’t completely useless. Fake buttons can actually make you feel better by offering you a sense of control.“Perceived (能够感知的)control is very important. It reduces stress and increases well-being,” Ellen J.L anger, a psychology professor, told The Times, adding that a lack of control is associated with depression .Experts have revealed that a lot of bu ttons that don’t do anything exist in our lives for this same purpose.For example, many offices in the US have fake the rmostats(恒温器)because people tend to feel better when they think they can control the temperature in their workspace.“That habit is here to stay,” John Kounios, a psychology professor, told The Times.“Even though I have real doubts about the traffic light buttons, I always press them. After all, I’ve got nothing else to do wh ile waiting. So why not press the button on the off chance tha t this one will work?”28.What is the best title of the passage?A. Different kinds of fake buttonsB. Different functions of fake buttonsC. People’s different habits when pushing buttonsD. Advantages and disadvantages of fake buttons29.In America, the “close” buttons on elevators___.A. work only when people press them hard for a whileB. cannot speed up the process of closing the door in any circumstanceC. are fake for the convenience of disabled peopleD. were specially designed to give people a sense of control30.The underlined part “for this same purpose” in Paragraph 6 refers to _____.A. giving people perceived controlB. making people more patientC. helping people to build up confidenceD. making people with depression feel better31.According to John Kounios, people who press fake buttons__________.A. probably have such a habitB. should give up this habitC. consider what they do to be meaninglessD. don’t know that what they press is fakeD“Microbots” smaller than the width of a human hair could be highly effective and cost-efficient tools for removing lead and other pollutants from industrial wastewater, according to a new study published in the journal Nano Letters last month. In the space of a single hour, the study showed the microbots could remove up to 95 percent of lead from water.Lead is commonly found in wastewater from mines or factories that make batteries and electronic devices, and can cause a serious risk to public health, as the water crisis in Flint, Michigan shows. Industrial activities can also contaminate water with arsenic(砷), mercury (汞)and other metals.Heavy metal pollution can cost big cities billions of dollars a year, said Samuel Sanchez, co-author of the study and ICREA professor at the Institute for Bioengineering of Catalonia in Spain. He added that current methods of treating the pollution either are expensive or produce secondary waste.Sanchezs said his team imagined using the microbots “for the pre-treatment of industrial wastewater before dumping into a river”. The microbots have three layers. The outer layer is made of some thing that absorbs heavy metals, while a middle layer makes the microbots ferro-magnetic(铁磁性的)so that they can be directed by external magnets. An inner layer reacts when hydrogen peroxide(双氧水)is dded to the wastewater, producing a stream of oxygen micro-bubbles that the microbotseject(喷射)to push themselves in the water. Once the bots finish their clean-up work, external magnets collect them for reuse. The heavy metal pollutants can also be recycled, making the process even more efficient.“This technique can be helpful, so we imagine that small companies can use microbots to deal with their water in case they can’t afford to bring their waste water to plants that handle polluted water,” Sanchezs said.“In my opinion, we should see first commercial use of self-driven microbots in the next couple of years.”32.The microbots are created mainly to______A. remove heavy metals in riversB. help residents drink cleaner waterC. remove heavy metals from industrial wastewaterD. remove different heavy metals from water33.What does the underlined word” contaminate” in Paragraph 2 probably mean?A. CirculateB. PolluteC. SurroundD. Pour34.What Samuel Sanchez said in Paragraph 3 mainly implies that____.A. there is no way to treat pollutionB. it’s really costly to treat water pollutionC. heavy metal pollution is a serious problem in big citiesD. cost-efficient tools for treating water pollution are important35.What’sthefunctionofhydrogenperoxideintheprocess?A. To help the microbots move.B. To work as external magnetsC. To reduce oxygen micro-bubbles.D. To make the microbots ferromagnetic.第二节(共5 小题;每小题2分,满分10 分),根据短文内容, 从短文后的选项中选出能填入空白处的最佳选项,选项中有两项为多余选项Parrots are fascinating pets and a lot of people own them.36 It can hurt people when a parrot bites. Parrots and other birds usually view biting as a form of play because it is how they naturally play with other birds. They might bite because they are too excited or angry37 The good news is that you can easily correct this behaviour and train your parrot to stop biting.First of all figure out what is causing your parrot to bite by observation. Do not make eye contact while interacting you’re your parrot. Simply observe your parrot’s behaviour and body language.38 ,Relax yourself. Many birds including parrots can feel that you are nervous or anxious.A nervous parrot is more likely to bite. 39 Before you interact with your parrot make sure you are calm and confident. If you are calm and confident your parrot is less likely to bite._40_ Most of the time parrots bite because they want to be left alone. If your parrot bites you after trying to take her out of her cage .immediately return her to her cage and shut the door.Use these tips with your parrot and there should be no more biting within days or weeks. Every parrot learns at a different pace so be patient and consistent.A. Leave your parrot alone.B. If you are hurt walk away from the room.C. Like most birds parrots can bite.D. Your parrot could be a bit more attractive than others.E. This will actually make your parrot feel nervous as well.F. Take note of the particular behaviour and body language before your parrot bites.G. A parrot can also bite because they feel uncomfortable with their beak.第三部分英语知识运用(共两节,满分45 分)第一节完形填空(共20 小题;每小题1.5 分,满分30 分)阅读下面短文,从短文后各题所给的四个选项(A、B、C 和D )中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。