【附加36套精选模拟试题】重庆市七校联考2020届高三第二次诊断性考试提前模拟理综试卷(含答案)
重庆市2020届高三“二诊”考试数学(文)试题答案

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重庆市名校联盟2020届高三毕业班下学期第二次高考模拟联考(二诊)数学(文)试题(解析版)

绝密★启用前重庆市名校联考联盟2020届高三毕业班下学期第二次高考模拟联考(二诊)数学(文)试题(解析版)一、选择题1. 已知集合{}{}21,0,1,2,3,log 1A B x x =-=≤,则A B =( )A. {}1,2B. 1,0,1,2C. {}1,2,3D. {}1,0,1,2,3- 【答案】A【解析】【分析】由2log 1x ≤,得02x <≤,然后根据集合的交集运算,即可得到本题答案.【详解】因为{}{}{}21,0,1,2,3,log 102A B x x x x =-=≤=<≤,所以{}1,2A B =. 故选:A【点睛】本题主要考查集合的交集运算及对数不等式.2. 设复数z 满足1i z =-,则z 的共轭复数的虚部为( )A. 1B. -1C. i -D. i 【答案】A【解析】【分析】先求解出z 的共轭复数z ,然后直接判断出z 的虚部即可.【详解】因为1z i =-,所以1z i =+,所以z 的虚部为1.故选:A.【点睛】本题考查共轭复数概念以及复数的实虚部的认识,难度较易.复数z a bi =+的实部为a ,虚部为b .3. 观察式子:213122+<,221151233++<,222111712344+++<,,则可归纳出式子为( ) A. 22211111 (2321)n n ++++<- B. 22211111...2321n n ++++<+ C. 222111211...23n n n -++++< D. 22211121...2321n n n ++++<+ 【答案】C【解析】【分析】观察式子:不等号的右边是一个分数,分母依次为2,3,4,分子依次为3,5,7,归纳得到答案.【详解】观察式子:213122+<,221151233++<,222111712344+++<,不等号的右边是一个分数,分母依次为2,3,4,分子依次为3,5,7,进而归纳得:222111211...23n n n-++++<. 故选:C .【点睛】本题考查了归纳推理,意在考查学生的推理能力.4. 已知257log 2,log 2,0.5a abc -===,则a ,b ,c 的大小关系为( ) A. b a c << B. a b c <<C. c b a <<D. c a b <<【答案】A【解析】【分析】根据对数函数的图像以及性质,即可容易判断,a b 大小,根据指数函数的性质,即可判断c 的范围,据此即可得到结果.【详解】画出57log ,log y x y x ==的图象如下所示:。
重庆市名校联盟高2020届“二诊”模拟理数(含解析)

试卷类型:B重庆市名校联盟高2020级“二诊”模拟考试理科数学(考试时间:120分钟 试卷满分:150分)注意事项:1.答卷前,考生务必将自己的姓名、准考证号填写在答题卡上。
2.回答选择题时,选出每小题答案后,用铅笔把答题卡上对应题目的答案标号涂黑。
如需改动,用橡皮擦干净后,再选涂其他答案标号。
回答非选择题时,将答案写在答题卡上。
写在本试卷上无效。
3.考试结束后,将本试卷和答题卡一并交回。
一、选择题(本大题共12小题,每小题5分,共60分.在每小题给出的四个选项中,只有一个选项是符合题目要求的) 1.设集合{|{|19}A x y B x x ===<≤,则=A .(1,3)B .(3,9)C .[3,9]D .∅2.设43z i =-,则在复平面内1z对应的点位于 A .第一象限B .第二象限C .第三象限D .第四象限3.若x ,y 满足约束条件40,20,20,x y x x y -+≥⎧⎪-≤⎨⎪+-≥⎩且z ax y =+的最大值为26a +,则a 的取值范围是A .[1,)-+∞B .(,1]-∞-C .(1,)-+∞D .(,1)-∞-4.小方,小明,小马,小红四人参加完某项比赛,当问到四人谁得第一时,小方:“我得第一名”;小明:“小红没得第一名”;小马:“小明没得第一名”;小红:“我得第一名”.已知他们四人中只有一人说真话,且只有一人得第一名.根据以上信息可以判断出得第一名的人是A .小明B .小马C .小红D .小方()B A C R I5.设点O 在ABC ∆的内部,且有()32AB OB OC =+u u u v u u u v u u u v,则ABC ∆的面积与BOC ∆的面积之比为A .3B .13C .2D .126.《算法统宗》全称《新编直指算法统宗》,是屮国古代数学名著,程大位著.书中有如下问题:“今有五人均银四十两,甲得十两四钱,戊得五两六钱.问:次第均之,乙丙丁各该若干?”意思是:有5人分40两银子,甲分10两4钱,戊分5两6钱,且相邻两项差相等,则乙丙丁各分几两几钱?(注:1两等于10钱) A .乙分8两,丙分8两,丁分8两B .乙分8两2钱,丙分8两,丁分7两8钱C .乙分9两2钱,丙分8两,丁分6两8钱D .乙分9两,丙分8两,丁分7两7.设实数1a -=⎰,则6212ax x ⎛⎫- ⎪⎝⎭展开式中的常数项为 A .352π-B .320π-C .41516πD .415π8.在直角坐标系xOy 中,角α的顶点在原点,始边与x 轴的非负半轴重合,终边与圆22:4O x y +=交于第一象限内的点P ,点P 的纵坐标为23,把射线OP 顺时针旋转3π,到达射线OQ ,Q 点在圆O 上,则Q 的横坐标是A .6B .6C .3D .39.下图是一个算法的程序框图,如果输入0i =,0S =,那么输出的结果为A .23B .34C .45D .5610.设函数()f x 是定义在(1,)-+∞上的连续函数,且在0x =处存在导数,若函数()f x 及其导函数()f x '满足()f x '()()ln(1)1f x fx x x x +-¢=+,则函数()f x ( ) A .既有极大值又有极小值 B .有极大值 ,无极小值 C .有极小值,无极大值D .既无极大值也无极小值11.过双曲线22221(0,0)x y a b a b-=>>的右焦点F 作渐近线的垂线,设垂足为P (P 为第一象限的点),延长FP 交抛物线22(0)y px p =>于点Q ,其中该双曲线与抛物线有一个共同的焦点,若1()2OP OF OQ =+u u u r u u u r u u u r,则双曲线的离心率的平方为A .5B .5 C .51+ D .51+ 12.奔驰定理:已知O 是ABC ∆内的一点,BOC ∆,AOC ∆,AOB ∆的面积分别为A S ,B S ,C S ,则0A B C S OA S OB S OC ⋅+⋅+⋅=ru u u v u u u v u u u v .“奔驰定理”是平面向量中一个非常优美的结论,因为这个定理对应的图形与“奔驰”轿车(Mercedes benz )的logo 很相似,故形象地称其为“奔驰定理”若O 是锐角ABC ∆内的一点,A ,B ,C 是ABC ∆的三个内角,且点O 满足OA OB OB OC OC OA ⋅=⋅=⋅u u u v u u u v u u u v u u u v u u u v u u u v,则必有A .sin sin sin 0A OAB OBC OC ⋅+⋅+⋅=ru u u v u u u v u u u vB .cos cos cos 0A OA B OBC OC ⋅+⋅+⋅=u u u v u u u v u u u v vC .tan tan tan 0A OA B OB C OC ⋅+⋅+⋅=ru u u v u u u v u u u vD .sin 2sin 2sin 20A OA B OB C OC ⋅+⋅+⋅=ru u u v u u u v u u u v二、填空题微博橙子辅导(本大题共4小题,每小题5分,共20分)13.已知实数x ,y 满足22020220x y x y x y --≥⎧⎪-+≥⎨⎪+-≥⎩,则3z x y =-的最小值为________.14.已知等差数列{}n a 和等差数列{}n b 的前n 项和分别为,n n S T ,且()*3221nn S n n N T n +=∈-,则33a b =______. 15.长沙市为了支援边远山区的教育事业,组织了一支由13名教师组成的队伍下乡支教,记者采访队长时询问这个团队的构成情况,队长回答:“(1)有中学高级教师;(2)中学教师不多于小学教师;(3)小学高级教师少于中学中级教师;(4)小学中级教师少于小学高级教师;(5)支教队伍的职称只有小学中级、小学高级、中学中级、中学高级;(6)无论是否把我计算在内,以上条件都成立.”由队长的叙述可以推测出他的学段及职称分别是____. 16.定义函数{}12()min (),()f x f x f x =,表示函数1()f x 与2()f x 较小的函数.设函数1()2x f x =,2()32x pf x -=⋅,p 为正实数,若关于x 的方程()3f x =恰有三个不同的解,则这三个解分别是________.三、解答题微博橙子辅导(本大题共6小题,共70分.解答应写出文字说明、证明过程或演算步骤)17.(本小题满分12分)在中,角A ,B ,C 的对边分别为a ,b ,c ,且()222(2)2cos a c a b c abc C --+=.(1)求角B 的大小;(2)若3sin 13cos 02A C ⎛⎫+-+= ⎪ ⎪⎭,求ba 的值.18.(本小题满分12分)如图1所示,在等腰梯形ABCD 中, ,3,15,33BE AD BC AD BE ⊥===.把ABE ∆沿BE 折起,使得62AC =,得到四棱锥A BCDE -.如图2所示.(1)求证:面ACE ⊥面ABD ;(2)求平面ABE 与平面ACD 所成锐二面角的余弦值.19.(本小题满分12分)已知椭圆2222:1(0)x y C a b a b +=>>,1F 、2F 为椭圆的左、右焦点,21,2P ⎛⎫ ⎪ ⎪⎝⎭为椭圆上一点,且132||2PF =. (1)求椭圆的标准方程;ABC ∆(2)设直线:2l x =-,过点2F 的直线交椭圆于A 、B 两点,线段AB 的垂直平分线分别交直线l 、直线AB 于M 、N 两点,当MAN ∠最小时,求直线AB 的方程.20.(本小题满分12分) 已知函数()ln 1x f x x+=. (1)求函数()f x 的单调区间和极值;(2)证明:()()2*222ln 2ln 3ln 21,22341n n n n N n n n --++⋅⋅⋅+<∈≥+. 21.(本小题满分12分)手工艺是一种生活态度和对传统的坚持,在我国有很多手工艺品制作村落,村民的手工技艺世代相传,有些村落制造出的手工艺品不仅全国闻名,还大量远销海外.近年来某手工艺品村制作的手工艺品在国外备受欢迎,该村村民成立了手工艺品外销合作社,为严把质量关,合作社对村民制作的每件手工艺品都请3位行家进行质量把关,质量把关程序如下:(i )若一件手工艺品3位行家都认为质量过关,则该手工艺品质量为A 级;(ii )若仅有1位行家认为质量不过关,再由另外2位行家进行第二次质量把关,若第二次质量把关这2位行家都认为质量过关,则该手工艺品质量为B 级,若第二次质量把关这2位行家中有1位或2位认为质量不过关,则该手工艺品质量为C 级;(iii )若有2位或3位行家认为质量不过关,则该手工艺品质量为D 级.已知每一次质量把关中一件手工艺品被1位行家认为质量不过关的概率为13,且各手工艺品质量是否过关相互独立. (1)求一件手工艺品质量为B 级的概率;(2)若一件手工艺品质量为A ,B ,C 级均可外销,且利润分别为900元,600元,300元,质量为D 级不能外销,利润记为100元.①求10件手工艺品中不能外销的手工艺品最有可能是多少件; ①记1件手工艺品的利润为X 元,求X 的分布列与期望.请考生在第22、23两题中任选一题作答.注意:只能做所选定的题目.如果多做,则按所微博橙子辅导做的第一个题目计分. 22.(本小题满分10分)在直角坐标系xOy 中,曲线C 的参数方程为2221121t x t t y t ⎧-=⎪⎪+⎨⎪=⎪+⎩(t 为参数).点()00,p x y 在曲线C 上,点(,)Q m n满足002m x n =⎧⎪⎨=⎪⎩. (1)以坐标原点O 为极点,x 轴的正半轴为极轴建立极坐标系,求动点Q 的轨迹1C 的极坐标方程;(2)点A ,B 分别是曲线1C 上第一象限,第二象限上两点,且满足2AOB π∠=,求2211||||OA OB +的值.23.(本小题满分10分) 设函数()211f x x x =-++. (1)求不等式()4f x ≥的解集;(2)记函数()f x 的最小值为t ,若,,a b c 为正实数,且a b c t ++=,求222a b c ++的最小值.理科数学参考答案(B卷)17.(1)①角,,A B C的对边分别为,,a b c,且()()22222cosa c abc abc C--+=①()()2222cos2a c a c bb Cac-+-=,①()2cos cosa c Bb C-=①cos2cosb Ba c C=-,①由正弦定理得:2sin sin sina b cRA B C===,①2sina R A=,2sinb R B=,2sinc R C=,①2sin cos4sin2sin cosR B BR A R C C=-,①2sin cos sin cos sin cosA B C B B C-=,①2sin cos sin cos cos sinA B C B C B=+()sin sinC B A=+=,①sin0A≠,①1cos2B=①()000,180B∈,①060B=.(2)①sin1cos0A C+=⎭,①3sin102A C+-=,①1sin2A C-=,①060B=,①0018060C A=--,①0120C A=-,①()1sin1202A A-=,①)001sin cos120cos sin120sin2A A A+=①131sin cos sin222A A A⎛⎫--=⎪⎝⎭p p=11sin 22A A -=①()1cos 302A +=①000120A <<,①0003030150A <+<①030A =①由正弦定理得:sin sin a bA B=,060B =,030A =,①0sin sin6021sin sin302b B a A ==== 18.(1)证明:在等腰梯形ABCD 中3,15,BC AD BE AD ==⊥,可知6,9AE DE ==.因为3,BC BE BE AD ==⊥,可得6CE =.又因为6,AE AC ==222AC CE AE =+,则AE EC ⊥.又,BE AE BE EC E ⊥⋂=,可得AE ⊥面BCDE ,故AE BD ⊥.又因为tan DE DBE BE ∠===,则060DBE ∠=,tan 3BC BEC BE ∠===,则030BEC ∠=,所以CE BD ⊥, 又AE EC E ⋂=,所以BD ⊥面ACE ,又BD ⊂面ABD ,所以面ABD ⊥面ACE ; (2)设EC BD O ⋂=,过点O 作//OF AE 交AC 于点F ,以点O 为原点,以,,OB OC OF 所在直线分别为,,x y z 轴,建立如图所示的空间直角坐标系O BCF -.在BCE ∆中,①030BEO ∠=, BO EO ⊥,①93,,22EO CO BO ===,则39,0,,0,0,,0222B C E ⎛⎫⎛⎫⎛⎫- ⎪ ⎪ ⎪ ⎪⎝⎭⎝⎭⎝⎭, ①1//,,62FO AE FO AE AE ==, ①3FO =,则()90,0,3,0,,62F A ⎛⎫-⎪⎝⎭, ①//,9DE BC DE =,①3ED BC =u u u r u u u r ,①D ⎛⎫⎪ ⎪⎝⎭,①()()93,0,0,0,6,0,6,6,,02222BE AE CA CD ⎛⎫⎛⎫===-=-- ⎪ ⎪ ⎪ ⎪⎝⎭⎝⎭u u u r u u u r u u u r u u u r ,设平面ABE 的法向量为()1111,,n x y z =u r,由11·0{·0n AE n BE ==u r u u u r u r u u u r,得11160902z x y =+=,取1x ABE的法向量为)11,0n =-u r,设平面ACD 的一个法向量为()2222,,n x y z =u u r,由22·0{·0n CA n CD ==u u r u u u r u u r u u u r,得1111660{302y z x y -+=-=,取11x =,可得平面ABE的一个法向量为(21,n =--u u r . 设平面ABE 与平面ACD 所成锐二面角为θ,则1212·cos n n n n θ===u r u u r u r u u r 所以平面ABE 与平面ACD. 19.(1)设椭圆的左焦点1(,0)(0)F c c ->,则1PF ==,解得1c =,所以2||PF =,则由椭圆定义122PF PF a +==①2a =,1b = 故椭圆的标准方程为2212x y +=. (2)由题意直线AB 的斜率必定不为零,于是可设直线:1AB x ty =+, 联立方程22112x ty x y =+⎧⎪⎨+=⎪⎩得()222210t y ty ++-=, ①直线AB 交椭圆于()11,A x y ,()22,B x y ,①()()222442810t t t ∆=++=+> 由韦达定理12222t y y t -+=+,12212y y t =-+ 则22N t y t =-+,①22221122N N t x ty t t =+=-+=++①MN AB ⊥,①MN k t =-,①222226||222t MN t t +=--=++又121||||2AN AB y y ==-=①23||tan 4||t MN MAN AN +⎫∠===≥==即1t =±时取等号.此时直线AB 的方程为10x y +-=或10x y --=.20. (1)①函数()ln 1x f x x+=,①0x >,则()2ln 'x f x x =-, 由()'0f x =,得1x =,列表如下:因此增区间为()0,1,减区间为()1,+∞,极大值为()11f =,无极小值.(2)证明:由(1)可得()()()max ln 111x f x f x f x+=≤==, ①ln 11x x x≤-,当且仅当1x =时取等号. 令()2*,2x nn N n =∈≥,①222ln 11n n n<-,①()()22ln 1111111111222121n n n n n n n n ⎡⎤⎛⎫⎛⎫<-<-=-+≥⎢⎥ ⎪ ⎪++⎝⎭⎝⎭⎣⎦, ①222ln 2ln 3ln 23n n ++⋅⋅⋅+11111111111122323421n n ⎛⎫⎛⎫⎛⎫<-++-+++-+ ⎪ ⎪ ⎪+⎝⎭⎝⎭⎝⎭L ()()2*111211,221241n n n n N n n n --⎛⎫-+-=∈≥ ⎪++⎝⎭=. 21.(1)一件手工艺品质量为B 级的概率为122311116C (1)(1)33381⨯⨯-⨯-=. (2)①由题意可得一件手工艺品质量为D 级的概率为2233331117C ()(1)C ()33327⨯⨯-+⨯=, 设10件手工艺品中不能外销的手工艺品可能是ξ件,则7~(10,)27B ξ, 则1010720()C ()()2727k k k P k ξ-==,119101010720C ()()(1)7072727720()2020C ()()2727k k k k k k P k k P k k ξξ++--=+-===+. 由70712020k k ->+得5027k <,所以当1k =时,(2)1(1)P P ξξ=>=,即(2)(1)P P ξξ=>=, 由70712020k k -<+得5027k >,所以当2k ≥时,(1)()P k P k ξξ=+<=, 所以当2k =时,()P k ξ=最大,即10件手工艺品中不能外销的手工艺品最有可能是2件.①由上可得一件手工艺品质量为A 级的概率为318(1)327-=,一件手工艺品质量为B 级的概率为1681, 一件手工艺品质量为C 级的概率为1212321111120C (1)[C (1)()]3333381⨯⨯-⨯⨯⨯-+=, 一件手工艺品质量为D 级的概率为727, 所以X 的分布列为则期望为81620713100()9006003001002781812727E X =⨯+⨯+⨯+⨯=. 22. (1)222222212111t t x y t t ⎛⎫-⎛⎫+=+=⎪ ⎪++⎝⎭⎝⎭, ①(]2211,11t t-∈-+,①1x ≠-,①221(1)x y x +=≠-, 由题可知:002m x n =⎧⎪⎨=⎪⎩022021(2)43m x m n m y ⎧=⎪⎪⇒⇒+=≠-⎨⎪=⎪⎩, 1C :22223cos 4sin 12ρθρθ+=(πθπ-<<).(2)因为222123cos 4sin ρθθ=+, 设()11,A ρθ,21,2B πρθ⎛⎫+ ⎪⎝⎭, 则2211213cos 4sin 112θθρ+=, 2211223cos 4sin 12212ππθθρ⎛⎫⎛⎫+++ ⎪ ⎪⎝⎭⎝⎭=22113sin 4cos 12θθ+=, 22221211117||||12OA OB ρρ+=+=.23.(1)原不等式等价于:1314x x ≤-⎧⎨-+≥⎩或1134x x -<<⎧⎨-+≥⎩或1314x x ≥⎧⎨-≥⎩, 解得1x ≤-或53x ≥, 所以不等式()4f x ≥的解集是5(,1][,)3-∞-⋃+∞.(2)由(1)函数()f x 的最小值为2,所以2t =,所以2a b c t ++==,所以()()222234a b c a b c ++⨯≥++=, 所以22243a b c ++≥,当且仅当23a b c ===时,取等号. 所以222a b c ++的最小值是43.。
重庆市名校联盟2020届高三二诊模拟考试英语试题及答案

重庆市名校联盟2020届高三“二诊”模拟考试英语(考试时间:120分钟试卷满分:150分)第一部分阅读理解(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A、B、C和D四个选项中,选出最佳选项。
AEnjoy an amazing time in Lake Tahoe, CA with the fantastic show, Magic Fusion! This fantastic display features a variety of talented magicians who each take to the stage with their own flare, tricks, and illusions(视觉幻想) that will have the audiences who witness the show on the edge of their seats.Presented by the amazing Loft Theatre, this show has seen the likes of famous magicians such as Robert Hall and Chipper Lowell. Each evening stars a different magician as well, so you can enjoy a variety of talented performers all on the same stage. It is great for all ages, so you can bring the entire family along to be excited and entertained during this 75-minute performance. You never know what you may see, so do not miss out!The Loft Theatre is Lake Tahoe’s premier place for entertainment and delicious food. Not only is it home to amazing shows that will entertain and thrill, but it is also home to a dining experience that serves up some mouthwatering meals. Before your show, be sure to grab a bite to eat before heading over to enjoy the Loft. It is located in the extremely popular Heavenly Village area of Lake Tahoe next to sparkling fountains and the famous Heavenly Toy Shop. It also features a lounge(休息室) and guests who arrive early can enjoy food, fun, and magicians who will wow you with tricks for that extra dose(量) of entertainment!For an amazing experience that you will not soon forget, be sure to enjoy this fantastic performance at the Loft Theatre!Enjoy this amazing show that will keep you guessing with tons of great tricks and illusions to keep you and your whole family entertained. You can be on the edge of your seat with this option of regular seating to witness this fantastic show, or experience the Magic Fusion show in the best seats possible. Order your tickets today!1.What can we learn about Magic Fusion?A.It is intended for all the family members.B.The display will last for one and half hours.C.Different performers will be performing together.D.Audiences will be invited onto the stage during the show.2.The Loft Theatre.A.lies in a famous largely populated areaB.is well-known for the surrounding sceneryC.serves food before and after the performanceD.provides those who come early with extra show3.What is true about the arrangement of the performance?A.The performance on Friday finishes earlier.B.The show starts from 9:00 pm every Tuesday.C.There are two performances available every Sunday.D.Regular and VIP seating are offered on different days.BTiredness, coughing, a runny nose and a sore throat—among all sicknesses there is probably none more common than the flu (流感), which we all get now and then. However, bird flu is a completely different story.In 2003, the H5N1 bird flu swept across 15 countries, including China, with sufferers reporting chest pain, difficulty breathing, fever and severe coughing. More than 600 people were infected, and about 60 percent died. Now, another type of bird flu hit Shanghai and three neighboring provinces, and this time the virus is called H7N9. By the afternoon of April 11, the new virus had taken nine lives out of 35 infected, according to Xinhua News Agency.The “H” and “N” in the virus’ name refer to two kinds of proteins (蛋白质) on the surface of the virus. Any change of the numbers of the two proteins indicates a new mutation(变异). Most of the mutations only affect birds, such as chickens and pigeons, and don’t normally spread to humans. But once they do, the results can be disastrous.“Any time an animal influenza virus crosses to humans, it is a cause for concern, ” Malik Peiris, virologist (病毒学家) at the University of Hong Kong, told Nature magazine. Take the SARS epidemic (传染病) in 2003 as an example. The virus behind the disease is thought to have jumped to humans from animals. The virus was a complete “stranger” to human bodies, which hadn’t developed an immunity (免疫力) against it.But there is something more about the new H7N9 bird flu. Unlike the H5N1 bird flu, which causes severe sickness in birds, the H7N9 has been evolving under the radar(悄悄地) since it travels between birds without causing noticeable illness. That makes it difficult to keep track of the disease.The good news is that there’s so far no sign that the virus is spreading from person to person. But since there is no vaccine (疫苗) for the disease yet, the World Health Organization recommends that you wash your hands after meeting with sick people and before and after you eat or prepare food, and they also suggest avoiding contact with birds or their eggs.4.Which of the following statements is TRUE according to the text?A.The H5N1 bird flu turned out to have something to do with the SARS epidemic.B.More than 600 people across the world died from the H5N1 bird flu in 2003.C.Most of the mutations of the proteins in the bird flu virus are harmful to both birds and humans.D.The name, H7N9 bird flu, shows that there have been new mutations of the proteins in the virus.5.With the example of the SARS epidemic in Paragraph 5, the author intends to.A.introduce where the SARS virus came fromB.inform us of the harmful effects of the SARS epidemic ten years agoC.show the horrible effects an animal influenza virus can have once it spreads to humansD.compare the differences between the SARS epidemic and the H7N9 bird flu6.What makes the H7N9 bird flu more frightening than the H5N1 bird flu according to the text?A.It can cause severe sickness in birds.B.It can spread from person to person.C.It affects a greater number of birds.D.It doesn’t sicken birds and thus can spread unnoticed.7.What are people advised to do to protect themselves against the H7N9 bird flu?a. To get vaccinated for the disease.b. To keep away from birds and their eggs.c. To stop eating chickens and ducks.d. To avoid meeting with sick people.e. To wash hands thoroughly and regularly.A.a, b B.c, d C.b, e D.a, eCWhen considering housing options at the University of Waterloo in Canada, Nigerian undergraduate student Ayooluwa Solaja chose a Living Learning Community, a residential house focused on a theme or academic interest area. Solaja lived on campus with 10 to 1s other students in the Arts and Business LLC.Three reasons may account for the prospective international stadents willingnessto consider LLCS.1. Connect with like-minded students: Prospective international students can choose an LLC to fully experience college life in a new country and find immediate support among residents: Unlike other housing arrangements, LLCS can provide a built-in community of like-minded individualsSolaja says a highlight of her experience in the LLC was"forming relationships with upper-year students in my program. This peer leader provided her with everything from academic support to guidance on how to survive Canadian winters. Many LLCS have upper-division students who serve as peer leaders.Australian Natasha Fitzpatrick says she's happy to share her love for travel and cultural exploration. "A group of us hired a car and traveled down to North Car olina sightseeing.”2. Participate in community activities: For those worried about being on the outside as a new internationalstudent, LLCS encourage participation through various on-and off-campus activities. For example, students in a fashion LLC have attended Toronto Fashion weekThrough LLCS, international students will have more opportunities to interact with domestic students, faculty and staff members outside classrooms,"says Shijuan Laurel Liu, assistant professor of Chinese and a partner with the Global Awareness LLC.In a Chinese New Year celebration associated with the LLC, for instance, students from her language and culture courses worked with Chinese students to introduce Chinese culture to the communitySolaja says coming from a different education system in Nigeria with sometimes unapproachable professors, she enjoyed LLC on-campus events like when she played board games with Waterloo professors and academic advisers.3. Network for job opportunities: International students who plan to gain work experience in the country they study in can benefit from LLCS that are associated with campus departments and staff. This can provide them with chances to network and inquire about work opportunities.Liu says when Chinese tutoring positions and graduate assistantships became available, she thought of international students from the Global Awareness LLC who previously helped her organize events. She also wrote reference letters for those students when they applied to graduate school.Robert C.Demezzo, director of residence life at Southern Connecticut State University, says LLCS "help many intermational students secure employment on campus.Solaja says her year living in Waterloo's Arts and Business LLC was one of her best decisions." You get what you put into the program," she says.8.What impressed Solaja most in the LLC?A.A group of students in the LLC rented a car to travel togetherB.She got a reference letter when she applied to graduate school.C.The peer leaders shared their experience both in study and daily lifeD.They celebrate the Chinese New Year together with an assistant professor9.Who are more likely to get Job opportunities?A.Students who have participated in more on-campus events.B.Students with better language skills especially in Chinese.C.Students who have global awareness and interest in network.D.Students with more working experience through LLCs.10.Which of the following statements is FALSE?A.Various activities help international students get oriented to the new lifeB.Individuals with similar minds will have the same career prospect.C.Each LLC focuses on a particular theme or academic interest area,D.LLCS Provide opportunities of communicating with domestic students11.Which of the following CANNOT be inferred from the passage?A.The teachers in Nigeria seldom participate in off-campus activitiesB.Many overseas students are not accustomed to the winter in CanadaC.The campus staff offer international students some academic support.D.LLCS help many international students find jobs after graduationDSince the Second World War, there has been an obvious trend, especially among the growing group of college students, toward early marriage. Many youths begin dating in the first stages of adolescence, ''go steady'' through high school, and marry before their formal education has been completed. In some quarters, there is much shaking of graying heads over the ways of rebellious youth. However, emotional maturity does not grow with age; it does not arrive automatically at twenty-one or twenty-five. Some achieve it surprisingly early, while others never do, even in three-score years and ten.Many students are marrying as an escape, not only from an unsatisfying home life, but also from their own personal problems of isolation and loneliness. However, any marriage entered into as an escape cannot prove entirely successful. The sad fact is that marriage seldom solves one's problems; more often, it merely worsens them. Furthermore, it is doubtful whether the home is capable of carrying all that the young are seeking to put into it; one might say that they are abandoning one idol only to worship another. Young people correctly understand that their parents are wrong in believing that success is the ultimate good, but they themselves are wrong in believing that they have found the true center of life's meaning. Their expectations of marriage are essentially unrealistic and therefore incapable of fulfillment. They want too much, and tragic disillusionment (幻想破灭) is often bound to follow.Shall we, then, join the chorus of those against early marriages? One cannot generalize: all early marriages are not bad any more than all later ones are good. Satisfactory marriages are determined not by how old one is, but by the emotional maturity of the partners. Therefore, each case must be judged on its own merits. If the early marriage is not an escape, if it is entered into with relatively few illusions or false expectations, and if it is economically practicable, why not? Good marriages can be made from sixteen to sixty, and so can bad ones.12.From Para. 1 we can learn that .A.emotional maturity automatically grow with ageB.some old people disapprove of early marriageC.growing group of college students are against early marriageD.the emotional expectations of young lovers are too high13.The author's attitude to marriage as an escape is .A.negative B.unsureC.indifferent D.acceptable14.It can be implied from the last paragraph that .A.early marriages should not be encouragedB.later marriages are always better than early marriagesC.each marriage should be looked at differentlyD.young people can benefit a lot from early marriage15.What's the best title of the passage?A.Disillusionment in Marriage B.Expectations for MarriageC.Marriages and Emotional Maturity D.The Trend of Early Marriages第二节微.博橙.子辅导(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。
2020重庆二诊 重庆市2020届高三英语二诊考试试题含答案

2020年普通高等学校招生全国统一考试5月调研测试卷英语参考答案1~5ACBAC6~10BAACB11~15CAACB16~20BACCB21~25ADABC26~30DDBCA31~35DBCAB36~40FDAGB41~45BCADA46~50CBDBA51~55CDABC56~60DACBD 61.everyone’s62.are sparing63.Countless/Uncountable64.strictest65.set 66.consisting67.for68.who69.daily70.yet/but短文改错:There was a time when I was addicted to online games.Because of that,my a lot.Instead for(或suffering)of scolding me,Mother gave me a book by Helen Keller and asked me to read it.Hardly have I finished a few pages when Ihadwas great attracted by Helen Keller.Despite her disability,she didn’t abandon hope and achieve a lot.This was her greatly achieved It determination and courage that made her∧huge success.aWhen I finished reading the book,Mother had a talk with me.“You can also accomplish which Helen Keller did.”what/all/everything Mother’s words ring in my ear whenever I see the book,inspired me to face challenges in life.ears inspiring书面表达:Dear Jack,How is your online business?Could you do me a favor?My grandfather is a well-known craftsman.He is an expert at making traditional Chinese clay figures like Guan Yu, Jiang Ziya,Nezha.Each figure is made of clay,2inches in size.When they are ready,they will be painted in different colours.With various facial expressions,the clay figures are life-like,each enjoying an interesting story.For example, Chinese people like Guan Yu,thinking he can drive out evil spirits and keep people safe.Here is a picture of each figure.I will write an introduction of each figure and pack it in a beautiful gift box.I think customers in your country will like them.By the way,I can supply them at$1each,and you can sell them at a proper price.Hoping it will benefit both of us.Thanks!Best wishes!Li Hua解析21.A。
重庆市江津、巴县、长寿等七校联盟2024届高三第二次诊断性考试数学试题试卷

重庆市江津、巴县、长寿等七校联盟2024届高三第二次诊断性考试数学试题试卷注意事项1.考生要认真填写考场号和座位序号。
2.试题所有答案必须填涂或书写在答题卡上,在试卷上作答无效。
第一部分必须用2B 铅笔作答;第二部分必须用黑色字迹的签字笔作答。
3.考试结束后,考生须将试卷和答题卡放在桌面上,待监考员收回。
一、选择题:本题共12小题,每小题5分,共60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.已知无穷等比数列{}n a 的公比为2,且13211112lim()3n n a a a →∞-++⋅⋅⋅+=,则242111lim()n na a a →∞++⋅⋅⋅+=( ) A .13B .23C .1D .432.关于函数22tan ()cos 21tan xf x x x=++,下列说法正确的是( ) A .函数()f x 的定义域为R B .函数()f x 一个递增区间为3,88ππ⎡⎤-⎢⎥⎣⎦ C .函数()f x 的图像关于直线8x π=对称D .将函数2sin 2y x =图像向左平移8π个单位可得函数()y f x =的图像 3.在复平面内,复数z =i 对应的点为Z ,将向量OZ 绕原点O 按逆时针方向旋转6π,所得向量对应的复数是( )A .1322i -+ B .3122i -+ C .1322i -- D .3122i -- 4.已知x 与y 之间的一组数据:x1 2 3 4 ym3.24.87.5若y 关于x 的线性回归方程为 2.10.25y x =-,则m 的值为( ) A .1.5B .2.5C .3.5D .4.55.设集合A={4,5,7,9},B={3,4,7,8,9},全集U=A ⋃B ,则集合中的元素共有 ( )A .3个B .4个C .5个D .6个6.若命题:从有2件正品和2件次品的产品中任选2件得到都是正品的概率为三分之一;命题:在边长为4的正方形内任取一点,则的概率为,则下列命题是真命题的是( )A .B .C .D .7.已知{}n a 为等差数列,若2321a a =+,4327a a =+,则5a =( ) A .1B .2C .3D .68.函数f x x 2()cos(2)3π=+的对称轴不可能为( ) A .65x π=-B .3x π=-C .6x π=D .3x π=9.定义:{}()()N f x g x ⊗表示不等式()()f x g x <的解集中的整数解之和.若2()|log |f x x =,2()(1)2g x a x =-+,{}()()6N f x g x ⊗=,则实数a 的取值范围是 A .(,1]-∞-B .2(log 32,0)-C .2(2log 6,0]-D .2log 32(,0]4- 10.如图,四边形ABCD 为平行四边形,E 为AB 中点,F 为CD 的三等分点(靠近D )若AF x AC yDE =+,则y x -的值为( )A .12-B .23-C .13-D .1-11.已知点2F 为双曲线222:1(0)4x y C a a -=>的右焦点,直线y kx =与双曲线交于A ,B 两点,若223AF B π∠=,则2AF B 的面积为( )A .22B .23C .2D .312.已知双曲线22221(0,0)x y a b a b-=>>的左焦点为F ,直线l 经过点F 且与双曲线的一条渐近线垂直,直线l 与双曲线的左支交于不同的两点A ,B ,若2AF FB =,则该双曲线的离心率为( ). A 10 B 6C 23D 3二、填空题:本题共4小题,每小题5分,共20分。
重庆2020届高三下学期高考前模拟考试物理试题Word版含答案及解析

重庆2020届高三下学期高考前模拟考试物理试题满分110分。
考试时间50分钟★祝考试顺利★注意事项:1.答题前,请考生认真阅读答题卡上的注意事项。
务必将自己的姓名、考号填写在答题卡上指定位置,贴好考号条形码或将考号对应数字涂黑。
用2B铅笔将试卷类型A填涂在答题卡相应位置上。
2.选择题每小题选出答案后,用2B铅笔把对应题目的答案标号涂黑。
如需改动,用橡皮擦干净后,再选涂其它答案标号。
答在试题卷、草稿纸上无效。
3.非选择答题用0.5毫米黑色墨水签字笔直接答在答题卡上每题对应的答题区域内,答在试题卷、草稿纸上无效。
4.考生必须保持答题卡的清洁。
考试结束后,监考人员将答题卡和试卷一并收回。
第Ⅰ卷选择题(共48分)一、选择题(本卷共8小题,每小题6分,共48分。
在每小题给出的四个选项中,其中第6~8题有多个选项符合题目要求。
全部选对的得6分,选对但不全的得3分,有选错的得0分。
)1.关于近代物理,下列说法正确的是()A. 卢瑟福由α粒子散射实验确立了原子有内部结构B. 氢原子光谱表明氢原子的能量是不连续的C. 光电效应揭示了光的粒子性,康普顿效应揭示了光的波动性D. 基态的一个氢原子吸收一个光子跃迁到n=3激发态后,可能发射3种频率的光子2.如图所示,小球从斜面的顶端A处以大小为的初速度水平抛出,恰好落到斜面底部的B 点,且此时的速度大小,空气阻力不计,该斜面的倾角为()A. 60°B. 45°C. 37°D. 30°3.某一双星系统中,A星球质量是B星球质量的2倍,两者之间的间距为。
经观测发现A 星球上的物质在缓慢地向外太空逃逸,若干年后A星球的质量变为原来的一半,间距减小,由观测知此时双星系统的角速度变为原来的1.5倍,则()A. 两星球之间距离变为B. 两星球之间距离变为C. A星球的轨道半径变为0.35D. A星球的轨道半径变为0.254.如图ABCD的矩形区域存在沿A至D方向的匀强电场,场强为E,边长AB=2AD,质量m、带电量q的正电粒子以恒定的速度v从A点沿AB方向射入矩形区域,粒子恰好从C点以速度v1射出电场,粒子在电场中运动时间为t,则()A. 若电场强度变为2E,粒子从DC边中点射出B. 若电场强度变为2E,粒子射出电场的速度为2v1C. 若粒子入射速度变,则粒子从DC边中点射出电场D. 若粒子入射速度变为,则粒子射出电场时的速度为5.如图所示,倾角为θ=30°的斜面上,一质量为6m的物块经跨过定滑轮的细绳与一质量为m的小球相连,现将小球从水平位置静止释放,小球由水平位置运动到最低点的过程中,物块和斜面始终静止。
2020年重庆市高考生物二诊试卷 (含答案解析)

2020年重庆市高考生物二诊试卷一、单选题(本大题共6小题,共36.0分)1.下列关于细胞结构和功能的说法,错误的是()A. 植物细胞“生命系统的边界”是细胞膜B. 胃蛋白酶分泌到消化道内不需要载体蛋白C. 胰岛B细胞分泌胰岛素的过程中一定会发生膜的融合D. 使遗传信息的传递更加高效属于生物膜系统在细胞生命活动中的作用2.肾上腺素是由人体肾上腺分泌的一种激素,能提高机体代谢,降低外周组织对葡萄糖的摄取。
下图为人体内肾上腺素合成的简化过程,相关叙述中正确的是()A. 肾上腺素作用使细胞可利用的葡萄糖减少,因此使机体耗氧量降低B. 寒冷环境会降低催化肾上腺素合成的酶的活性,使肾上腺素合成和分泌减少C. 与肾上腺素的合成和分泌有关的细胞器有核糖体、内质网、高尔基体、线粒体D. 机体稳态的调节过程中,肾上腺素与甲状腺素、胰高血糖素均具有协同作用3.下列关于人体淋巴细胞的叙述,错误的是A. B细胞和T细胞都是由造血干细胞发育成的B. 血液和淋巴中都含有B细胞和T细胞C. 在胸腺中发育成熟的T细胞可参与体液免疫D. 淋巴细胞包括B细胞、T细胞和吞噬细胞4.如图为一对同源染色体及其上的等位基因,下列叙述错误的是()A. 四分体时期发生了染色体的交叉互换B. 该细胞可产生四种基因型不同的配子C. N与n的分离发生在减数第一次分裂D. M与m的分离仅发生在减数第一次分裂5.下列对有关古语或诗句中的现象及方法,解释不正确的是A. “凡嫁接矮果及花,用好黄泥晒干,以小便浸之……以泥封树枝,则生根”——生长素促进扦插的枝条生根B. “红柿摘下,每篮用木瓜三枚放入,得气即发,并无涩味”——乙烯促进果实成熟C. “螟蛉有子,蜾蠃负之”——螟蛉与蜾蠃之间是捕食关系,此过程中螟蛉是捕食者D. “银烛秋光冷画屏,轻罗小扇扑流萤”——荧光素接受ATP提供的能量被激活后发生的化学反应6.不携带致病基因的个体不会患遗传病。
A. 正确B. 错误二、探究题(本大题共5小题,共51.0分)7.研究人员利用密闭玻璃容器探究环境因素对光合作用的影响,下面两个图是在温度适宜、CO2浓度为0.03%的条件下测得的相关曲线。
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重庆市七校联考2020届高三第二次诊断性考试提前模拟理综试卷(含答案)生物试题一、选择题:本题共13小题,每小题6分,在每小题给出的四个选项中,只有一项是符合题目要求。
1.(合川.原创)细胞是生物体结构和功能的基本单位,下列相关说法中正确的是()A.真核细胞的生物膜上分布的多种酶有利于多种化学反应的顺利进行B.蛋白质区别于脂质的特有元素是N和SC.去核后的变形虫不能再摄取食物,说明细胞核是生命活动的代谢中心D.细胞间信息交流必须依赖于细胞膜上的受体2.(綦江)下列关于教材实验的叙述中,错误的是()A.观察细胞中DNA和RNA的分布,应用甲基绿和吡罗红混合染色剂B.低温和秋水仙素都可以诱导多倍体植株的产生,且原理相同C.甘蔗中富含还原糖,可以作为鉴定还原糖的实验材料D.检测花生子叶装片中的脂肪和观察植物细胞有丝分裂都需要用到酒精3.(大足.改编)为了研究温度对某种酶活性的影响,设置三个实验组:A组(20℃)、B组(40℃)和C组(60℃),测定各组在不同反应时间内的产物浓度(底物量一定,其他条件相同),结果如图。
以下几种对曲线图的分析和理解不符实际的是()产物浓度A.不能通过该实验结果得出该酶活性的最适温度B.为保证实验的科学性,该酶一定不能选用H2O2酶C.t2时,限制C组酶促反应速率的因素是酶的数量D.t4时,将A组温度升高20℃,其反应速率不会加快4.(重实.改编)下列关于植物激素的说法,不正确的是()A.在植物幼嫩的部位生长素可以进行极性运输,且极性运输方向与光照无关B.脱落酸不能为植物提供营养,但可以调控细胞的基因表达C.相同浓度的生长素对同一植物不同器官的促进效果可能相同D.达尔文的实验证明生长素在背光处的分布比向光侧多5.(铜梁)红绿色盲属于伴染色体隐性遗传病,高血压病属于多基因遗传病。
某男子患红绿色盲和高血压病,其妻子和儿子的色觉正常。
下列叙述正确的是()A.该男子幼年时一定患高血压B.该男子的精子均含红绿色盲基因C.致病基因是导致患病的根本原因,人类遗传病患者都含有致病基因D.通过遗传咨询可评估子代患遗传病的风险6.(江津.原创)下列关于生态学知识的叙述,正确的是()A.草原生态系统的能量可以通过分解者的分解作用流向生产者B.研究发现多亲近大自然能让人放松心情,舒缓压力,这体现了生物多样性的直接价值C.在一个稳定的生态系统中,植物通过光合作用固定的碳与其呼吸作用释放的碳基本相等D.科学规划、设计农业生态系统,实现对能量的多级利用,从而提高能量的传递效率29.(大足、铜梁.改编)(10分)科研人员在一定二氧化碳浓度和温度条件下,利用苹果树、梨树幼苗进行实验,以探究不同光照强度对两种果树光合作用的影响,得到结果如图甲所示;图乙是在适宜温度条件下光照强度对苹果树幼苗O2产生总量和CO2释放量的影响。
请回答下列问题:相对值(1)图甲实验的自变量是。
(2)据图甲分析,当光照强度为0.3mmol光子/m2·s时,光反应中的生成速率限制了光合作用速率。
光照强度为0.1mmol光子/m2·s时,梨树叶肉细胞的光合速率呼吸速率(填“大于”、“小于”或“等于”),光照强度为0.5mmol光子/m2·s时,苹果树O2的产生速率为μg/m2·s(结果保留一位小数)。
(3)据图乙分析,当光照强度为(填“a”、“b”、“c”或“d”)时,该苹果树的总光合速率等于呼吸速率。
当光照强度为b 时,欲使该苹果树叶绿体中C3 的含量在短时间内快速下降,可改变的环境条件是。
30.(合川.改编)(10分)H7N9是禽流感病毒HxNx(RNA病毒)的一种亚型,流感病毒颗粒外膜由两型表面糖蛋白覆盖,一型为血细胞凝集素(即H),一型为神经氨酸酶(即N),H 又分15个亚型,N分9个亚型。
依据流感病毒特征可分为HxNx共135种亚型,人感染H7N9重症患者表现为重症肺炎,体温大多持续在39℃以上,可快速发展出现急性呼吸窘迫综合征、休克、意识障碍及急性肾损伤等。
据此回答下列问题:(1)禽流感病毒可分为HxNx共135种亚型,其变异(2)重症患者体温持续维持在39℃,此时人体的产热(填“大于”、“等于”或“小于”)散热,在此温度下因下降使患者体内细胞代谢紊乱;而急性肾损伤使肾脏排泄功能障碍,以上情况均可导致内环境的失调。
(3)患者重症肺炎,呼吸困难导致血液中CO2浓度升高使呼吸中枢兴奋,此处CO2 参与的调节方式是调节。
(4)分析重症肺炎,呼吸困难导致休克、意识障碍出现的可能原因是:大脑细胞因O2供应不足使细胞呼吸减弱而引起其生命活动所需的减少所致。
31.(江津.改编)(9分)下表为某生态系统的能量流动情况,请据表分析下列问题:(1)生态系统的结构包括 。
流入该生态系统的总能量是 kJ/m 2·a 。
(2)第二营养级到第三营养级的能量传递效率是 (结果用百分数表示,保留一位小数)。
(3)用标志重捕法调查该生态系统中某肉食性动物种群密度时,若调查结果偏大,可能的原因是 (至少答出一项)。
(4)若表中生物只构成一条食物链,植食性动物的同化量>呼吸消耗+被分解和未利用的能量,而肉食性动物的同化量=呼吸消耗+被分解和未利用的能量,原因是 。
32.(綦江.改编)(10分)果蝇眼色由A 、a 和B 、b 两对位于常染色体上的等位基因控制,基因A 控制色素形成,基因B 决定红色,基因b 决定粉色;当基因A 不存在时,果蝇眼色表现为白色。
为了研究这两对等位基因的分布情况,某科研小组进行了杂交实验,选取一对红眼(AaBb)雌雄个体进行交配,统计结果。
据此回答下列问题(不考虑基因突变和交叉互换):(1)如果子代表现型及比例为红色∶白色∶粉色= ,则这两对等位基因的遗传符合基因的自由组合定律,表现型为白眼的果蝇中,纯合子的基因型为 。
选择子代粉色眼雌雄个体自由交配,所产生后代的表现型及比例为 。
(2)若这两对等位基因位于一对同源染色体上,且子代个体表现型及比例为红色∶白色=3∶1,请在下图中标出亲本果蝇体细胞中这两对等位基因在染色体上的位置关系。
(3)若这两对等位基因的遗传符合自由组合定律,取亲本果蝇(AaBb)进行测交,则后 代的表型及比例为 。
(二)选考题:共45分。
请考生从给出的2道物理题、2道化学题、2道生物题中每科任选一题做答,并用2B 铅笔在答题卡上把所选题目题号后的方框涂黑。
注意所选题目的题号必须与红眼雌果蝇 红眼雄果蝇所涂题目的题号一致,在答题卡选答区域指定位置答题。
如果多做,则每按所做的第一题计分。
37.(重实.改编)(15分)[生物——选修1:生物技术实践]下表为培养某种微生物的培养基配方,请回答有关问题:(1)该培养基只允许分解尿素的细菌生长,这种培养基称为培养基。
该培养基在接种前应该用法灭菌。
(2)若要通过统计培养基中菌落数来估计样品中的细菌数,上述培养基中还需要添加的成分是,接种时应采用法,该方法接种培养后的菌落,不可能是下图中的(单选)。
(3)某同学用2mL菌液样品稀释106倍后,再取0.1mL稀释液涂布于平板上,测得菌落数的平均值为260,则每毫升菌液样品中的细菌数是。
(4)要确定牛等反刍动物的胃中是否含有大量的分解纤维素的微生物,除改变培养基中的碳源、氮源外,还要加入的指示剂是。
要鉴别大肠杆菌则应用作指示剂。
38.(长寿.原创)(15分)[生物——选修3:现代生物科技专题]乳房生物反应器是指将所需目的基因构建入载体,加上适当的调控序列,转入动物胚胎细胞,使转基因动物分泌的乳汁中含有所需要药用蛋白。
请分析回答相关问题:(1)乳房生物反应器主要应用了基因工程技术,该技术的原理是,常用的工具是。
基因工程中的目的基因主要是指编码蛋白质的基因,也可以是一些。
(2)在该过程中,科学家将药用蛋白基因与的启动子等调控组件重组在一起形成重组DNA分子;重组DNA分子由目的基因、启动子、终止子和等组成。
(3)工程菌也可用来生产药物,如果用大肠杆菌作为受体细胞,首先用处理细胞,使之变为感受态细胞,然后将重组DNA分子溶于中与感受态细胞混合。
(4)若要获得多个转基因个体应选择的桑椹胚或囊胚进行胚胎分割。
七校高2018级第二次诊断性考试提前模拟生物选择题:ACCDDB29.(10分)(1)光照强度和果树的种类(2分)(2)ATP和NADPH(也可以写成[H]的形式)(2分)大于(2分) 5.1(2分)(3)c(1分)增加光照强度或者停止供应二氧化碳(1分)30.(10分)(1)基因突变(2分)病毒RNA(或基因、遗传物质)(2分)(2)等于酶活性稳态(3)体液(2分)(4)能量(ATP)31.(9分)(1)生态系统的成分和食物链和食物(或答生态系统的成分和营养结构)(1分)30244(2)18.6%(3)该动物被捕获一次后更难捕获(标志物易脱落;被标记个体更易被天敌捕食)(合理即可)(4)肉食动物在该食物链中处于最高营养级,而植食动物部分能量要流入肉食动物32.(10分)(1)943;aaBB aabb;粉色:白色=81(2)A与B连锁,a与b连锁,两只果蝇一致。
(图略)(3)红色:白色:粉色=12137.(15分)(1)选择(1分)高温蒸汽灭菌(2)琼脂稀释涂布平板 D(3)2.6×109(4)刚果红伊红美蓝38.(15分)(1)基因重组(1分)运载体、限制酶和DNA连接酶具有调控作用的因子(2分)(2)乳腺蛋白基因(2分)标记基因(2分)(3)Ca2+ (2分)缓冲液(2分)(4)发育良好、形态正常(2分)七校高2018级第二次诊断性考试提前模拟化学试题7.(长寿.改编)化学与生产、生活密切相关,下列说法正确的是()A.“地沟油”禁止食用,但可以用来制肥皂B.从海水中提取物质都要通过化学反应才能实现C.造纸厂用二氧化硫进行纸浆漂白符合“绿色化学”的理念D.制作航天服的聚酯纤维和用于光缆通信的光导纤维都是新型无机非金属材料8.(合川.改编)设N A为阿伏加德罗常数的值,下列说法不正确的是()A.2.0gH218O与D2O的混合物中所含中子数为N AB.1L含N A个Al3+的Al(NO3)3溶液中,NO3-物质的量浓度大于3 mol/LC.4.6g金属钠与足量O2充分反应后,所得固体中阴、阳离子的总数为0.3N A D.1L 0.5 mol/L的FeCl3溶液充分水解后,所得Fe(OH)3胶粒的数目为0.5N A 9.(铜梁.改编)香精()可用下列反应制取。
下列说法正确的是()A.Y的同类型同分异构体的数目为6种(不含Y本身)B.、均可作为合成聚合物的单体C.和Y均可与氨基酸发生成肽反应D.若中含有、Y,可添加NaOH溶液通过分液除去10.(大足.原创)短周期主族元素A、B、C、D的原子序数依次增大,且A是周期表中半径最小的元素,A、D、B 分别排在连续的三个奇数族,且B和C相邻,下列说法正确的是()A.最高价氧化物对应水合物的酸性:B<CB.工业上制备D单质的方法为电解熔融的D氯化物C.A分别与B、C形成最简单化合物均为电解质D.简单离子半径:B>C>D11.(长寿.改编)下列实验装置或操作正确的是()A.图①向Ⅰ中通入过量CO2,出现白色沉淀,则溶液中一定含有SiO2-3B.图②中CuSO4溶液能使蛋白质变性,NaCl溶液使蛋白质发生盐析C.图③装置用来除去C2H4中的杂质SO2D.图④装置用来蒸发纯净的食盐水得精盐12.(重实.改编)利用如图装置,可完成很多电化学实验。