小题训练答案
文综小题训练12(有答案)

文综小题训练十二下图各坐标分别表示气候、地形、河流三种区位因素,箭头指示方向表示区位条件优越性增加。
读图完成3题。
3、据图示分析,下列说法正确的是A.若此图表示聚落区位因素,则B地聚落最有可能呈带状分布B.若此图表示人口区位因素,则G地人口可能分布在河流冲积平原上C.若此图表示工业区位因素,则E地水运条件最好D.若此图表示农业区位因素,则A地需要解决灌溉水源4、读图中X河流域土地利用结构变化表,表明1980年---2010年X河流域A.下游泥沙沉积严重B.径流季节变化变大C.生物多样性增加D.土壤层变薄如图为我国西北某河下游地区沙漠化分布图,读图回答5题5.确定不同类型沙漠化面积所借助的地理信息技术顺序是读我国某地等温线分布和地质剖面图,完成第6题。
6.下列关于该地的地质构造、地形及外力作用的分析,正确的是:A. 向斜成谷,主要受侵蚀作用B. 背斜成山,主要受堆积作用C. 向斜成山,主要受堆积作用D. 背斜成谷,主要受侵蚀作用根据紫金山天文台的计算,北京时间12月22日7时40分,我国迎来2010年的“冬至”。
读下图,回答第7题。
7. 2010年我国进入“冬至”时,下列叙述正确的是:A.甲地昼长等于乙地昼长 B.丙地的地球自转线速度最慢C.丁地常年受副热带高气压带控制 D.太阳直射点位于23°26′N ,175°W 图3表示我国某区域多平均的水平衡收支概算(单位:亿m3),该地区年均降水量约1000mm。
读图回答8—9题。
图38.该地区位于我国A.南方地区B.北方地区C.西北地区D.青藏地区9.该地区水资源利用过程中存在的主要问题是A.水资源短缺B.水污染严重C.水资源利用率低D.地下水过量开采图4是沿110。
E经线日平均气温稳定通过>100C的积温曲线图,读图回答10〜11题。
10. 图中数码①②③④四个地域所跨纬度相同,其中,日平均气温>100C的积温量随纬度变化最小的一组是.A.②③ B①④ C.①③ D.②④11. 图中⑤所示地区所处的温度带和适宜发展的农作物是A.热带一可可豆、水稻B.亚热带一水稻、油菜C.暖温带一谷子、棉花D.中温带一小麦、甜菜12、下图是正常情况下,某市场土豆供求数据的图示。
高三语文小题训练12(含答案)

高三语文小题训练12(含答案)1.下列词语中加点的字读音都不相同的一组是( )A. 唾.弃沉睡.千锤.百炼捶.胸顿足B. 憔悴.粉碎.猝.不及防出类拔萃.C. 啜.泣拾掇.缀.玉连珠苦学不辍.D. 悼.念泥淖.绰.绰有余掉.以轻心2.下列各句中,加点的成语使用恰当的一句是()A.全书收集了汪曾祺从1941年的第一篇小说到临终前的几乎全部作品,这对众多的“汪迷”来说,真可以大快朵颐....了。
B.这篇论文虽然材料翔实,条理清晰,但观点模糊,行文啰嗦,援引的事例失当,当为不刊之论....。
C.新的法规虽然更科学更严密,但对执法犯法的官员仅仅处以三百元人民币的罚款,也真有点儿罚不当罪....的意思。
D.西方发达国家各种光怪陆离....的社会现象,在这部留学生的回忆录里得到了生动的再现。
3.下列各句中,没有语病、句意明确的一句是()A.随着城市化进程,越来越多的农民告别了自己的耕地,为了减轻城郊失地农民的负担,当地政府采取了一系列措施。
B.近三年来,我市加大农业科技投入力度,使绿色食品的产量以平均每年递增百分之二十的速度大步向前发展,为农民增收创造了良好的条件。
C.这家位于洛带古镇的“中华老字号”的凉粉、凉面等小吃以配方独特、选料上乘、色味俱佳而吸引了众多蓉城食客。
D.国家对新型经济试验区的优惠政策引发了众多省区的竞争,而成渝两地入选全国统筹城乡配套改革试验区,这让众多的竞争者大大出乎意料之外。
4.阅读下面两首唐诗,然后回答问题。
汴河曲(唐)李益汴水东流无限春,隋家宫阙已成尘。
行人莫上长堤望,风起杨花愁杀人。
汴河怀古(唐)皮日休尽道隋亡为此河,至今千里赖通波。
若无水殿龙舟事,共禹论功不较多。
注:①汴河:即通济渠,隋炀帝时开挖的大运河的一段。
②隋家:隋王朝。
③水殿龙舟:当年隋炀帝出游时所乘坐的船只。
④不较多:差不多。
(1)两首诗都以“汴河”为题材,但所写的重点不同,抒发的感慨也不同,请作简要分析。
(2)这两首咏史诗的表达方式各有侧重,请分别加以说明。
文综小题训练15(有答案)

文综小题训练十五读某工业部门在某城市及其附近地区土地、运输和劳动力等成本曲线图。
其中土地成本和运费都只与距城市中心的远近、交通通达度有关,回答1~3题。
1.表示土地成本、运费、劳动力成本的曲线依次是A.a、b、c B.b.a、cC.c、b、a D.c、a、b2.据图判断,下列说法不正确的是A.②与④两处运费的差异主要由交通通达度造成B.交通通达度是影响①和②两处土地成本差异的主要因素C.距市中心远近对劳动力成本影响最小D.该城市西侧交通通达度比东侧高3.如果综合考虑土地、运输、劳动力等成本因素,该工业部门的工厂应布局在A.① B.② C.③ D.④下图为纬度300附近的三个城市示意图,据此回答4~5题。
4.有关所示三个地区地理特征的叙述,正确的是A.图中的三条河流汛期都在夏季 B.三地的气候都具有夏雨冬干的特点 C.三地都易遭到台风(飓风)的袭击 D.土地次生盐碱化都十分严重5.有关所示三个地区经济特征的叙述,正确的是A.三城市附近都是该国人口最稠密地区 B.①城所在国是世界著名的棉花生产国 C.②城市附近有该国最大的盐场 D.③城市附近有该国最大的电子工业区右图为我国四条东北——西南走向山脉,读图回答6~7题。
6.山脉①东西两侧的地形区分别是A.华北平原黄土高原B.东北平原内蒙古高原C.内蒙古高原东北平原D.黄土高原华北平原7.山脉②东西两侧地形区的主要地理事物分布的说正确的是A.闽江水系,长江水系 B.种植业,畜牧业C.落叶林,针叶林 D.冬小麦,谷子读下面两幅额图,其中左图中著名的古代建筑由白色大理石筑成。
回答8~9题。
8.该建筑位于右图中的:A.①B.②C.③D.④9.右图中①、②、③、④四地自然条件相比:A.①、②两地均为荒漠B.②地年降水量最少C.③地有明显的旱季和雨季D.④地比①地气温年较差大右图中阴影表示黑夜,箭头表示月光,完成 10题。
10.P点的白昼长是A.16小时 B.20小时C.12小时 D.14小时读图回答11题。
人教版五年级数学上册解决问题专项训练含答案

人教版五年级数学上册解决问题专项训练一、认真审题,填一填。
(第5小题4分,其余每小题2分,共18分)1.学校开展“我读书,我成长”活动。
聪聪看一本故事书,一共有a 页,他看了6天,每天看x页,用式子表示还没有看的页数是()页,当a=200,x=15时,还有()页没有看。
2.一个养鸡场要运出322 kg鸡蛋。
如果每个木箱最多能装15 kg鸡蛋,那么至少需要()个这样的木箱。
如果每家商店需要30 kg鸡蛋,可以分给()家商店。
3.黑龙江省广播电视塔——龙塔的高度相当于198个中国成年男性平均身高的总和。
已知中国成年男性的平均身高1.697米,龙塔的高度精确到整数约是()米。
4.2020年12月17日,嫦娥五号圆满完成“探月工程”的第六次任务,顺利返回地球并安全着陆。
已知嫦娥五号返回器的飞行速度大约是每秒11.2千米,这个速度大约相当于民航客机高空巡航速度的45倍,那么民航客机的高空巡航速度大约是每秒()千米。
(用循环小数的简便形式表示)5.工程队要修一座长a米的桥,已经修了8天,平均每天修b米,余下的要用x天修完。
(1)8b表示:(2)a-8b表示:(3)8+x表示:(4)a÷(8+x)表示:6.一块三角形平地,边长分别为12 m、18m、24m,要在三边上植树,每相邻两棵树之间的距离为3 m,三个角的顶点上各植一棵,一共要植树()棵。
7.【说理题】同同的妈妈计划拿出400元买衣服,她先在网上选了三件亲子装,78.8元一件;又给同同的爸爸选了一件89.9元的保暖衬衣,给同同选了一双69元的雪地靴。
请你估计一下同同的妈妈的钱够吗?()(填“够”或“不够”),理由:()。
8.【新题型】在解决问题“聪聪平均每分钟跳绳80次,,天天平均每分钟跳绳多少次?”时列式为80×1.5+8,需要补充的信息是()。
二、仔细推敲,选一选。
(将正确答案的序号填在括号里)(每小题2分,共12分)1.龙龙想用自己的300元零花钱买一些礼品(如表)寄给自己的朋友。
高三语文小题训练6(含答案)

高三语文小题训练6(含答案)1、下列各组词语中加点的字的读音,全都与所给注音相同的一组是()A.泊bó泊.位漂泊.水泊.梁山淡泊.名利B.澄chéng 澄.沙澄.澈秋水澄.碧澄.清事实C.辟pì辟.谣精辟.辟.地垦荒另辟.蹊径D.埋mái 埋.没埋.怨隐姓埋.名埋.头工作2、下列各句中,加点成语使用恰当的一句是()A.我还要借这个机会感谢很多在媒体工作的朋友,他们为我的小说做了很多宣传,他们的推波助澜....使更多的人了解了我的小说。
B.随着人民生活水平的提高,到酒楼过年渐成时尚。
中低档酒楼由于经济实惠,吸引顾客纷至沓来....。
C.时下的店名和商品名在吸收外来词时,追求时髦,哗众取宠,令人费解。
这些叫人看不懂的名称,只能让人贻笑大方....。
D. 高楼下面有数不尽的人,首尾相接....,不分男女老少,蹲在泥水、垃圾中,匍匐着,并不是成百上千,而是几十万!3、下列各句中加点的成语使用不恰当...的一句是……………………… ( )A.我们有很多遗产管理者太急功近利,他们把遗产定性为旅游资源,进行竭泽而渔....式的开发,这是极不负责的行为。
B.她提问时,总会把脸转向他。
她的问题不难,又同时加了许多暗示,答案几乎是呼之欲...出.。
C.荒诞戏剧没有戏剧冲突,故事情节支离破碎....,人物语言也颠三倒四,却更真实地反映现实的某些状况。
D.经过艰苦努力,他果然不负众望....,挽救了这家濒临倒闭的企业,并因此获得市“劳动模范”奖章。
4、下列各句中没有语病的一句是()A.水资源短缺严重制约着我国西部地区经济建设和生态建设的发展,能否实现水资源的可持续利用是西部开发的关键。
B.尊重生命不仅是对人而言,天地间所有的生命和造物主所有的恩惠都应该受到关爱和尊重。
C.从专业的音乐角度来说,我们要求听的是最原始的传统民歌,没有被装饰过的民歌艺术。
D.现在人们认识到,一方面极光与地球高空大气和地磁场的大规模相互作用有关,另一方面又与太阳喷发出来的高速带电粒子流——通常称为太阳风——有关。
高三文综小题训练16(有答案)

文综小题训练十六据悉,永辉超市将在我省某市开设分店。
图7和表1分别为该公司对该市的地租和交通状况调查的统计资料。
完成1~3题。
表1该市各区域聚落的交通联系状况统计表说明:甲、乙、丙表示该市的三个区域,a、b、c、d为区域内的四个聚落。
表中数据1 表示两聚落间有交通干线相连,数据0表示不相连。
1.该城市商业区范围的半径约为A.2千米B.2.7千米C.3.3千米D.4千米2.甲、乙、丙三个区域交通网络发达程度的比较,正确的是A.丙>乙>甲B.甲>乙>丙C.甲>丙>乙D.乙>丙>甲3.若只考虑交通通达度,则在甲区域开设分店的最优选址是A.聚落a B.聚落b C.聚落c D.聚落d读“全国及各区域平均多年沙尘暴日数相应的季节变化曲线”,回答4~5题。
4.我国沙尘暴天气多发生在A.春季 B.夏季 C.秋季 D.冬季5.我国沙尘暴天气多发在北方,其最主要影响因素是A.地势 B.气温 C.城市化水平 D.植被覆盖率随着生活节奏的加快,人们出行对时间因素考虑逐渐增多,且时间因素可能成为选择交通方式的主导因素,读“三种交通运输方式从门到门所需时间示意图”,回答6~7题。
6.就时间因素考虑,高铁和航空公司争夺的客源其旅程距离最可能为A.200公里B.600公里C.1000公里D.1400公里7.我国高铁网建成后,下列区段中,高铁对民航客运冲击最大的是A.济南—上海B.杭州—上海C.北京—广州D.兰州—北京读甲、乙两图,回答8~9题。
8.下列关于图中信息的表述,正确的是A.A在B的东南方,D在C的东北方B.B到C的实地距离比A到D的实地距离长很多C.农业地域类型都以季风水田农业为主D.两地区铁路的走向都受地形制约9.图乙中D所在阴影区域气候类型为热带雨林气候,其形成原因是①地形影响:位于山地迎风坡②气压带影响:终年受赤道低气压带的影响③洋流影响:沿岸有暖流经过④盛行风向:常年盛行东北信风A.①③ B.③④ C.①② D.②④杭州某中学生设计了一款可进行调节的活动遮阳板,以实现良好的遮阳和采光效果。
有理数的加减乘除乘方混合运算专题训练带答案

有理数的加减乘除乘方混合运算专题训练带答案1.先进行乘方,再进行乘除,最后进行加减运算。
2.同级运算从左到右进行。
3.如果有括号,先进行括号内的运算,按照小括号、中括号、大括号的顺序进行。
1.2+(-1)+3-(-1)2.(-81)/(-2.25)*(-1)/163.11+(-22)-3*(-11)4.(12)*(-1)-15*(-1)5.-3/2*(-32*(-2/3)^2-2)6.-23/(-4)^3-1/87.12/((-11/2)^2-2)8.(-2)^2*(-3)/129.(-0.5)^2-2/3*(-62)10.-22-(-2)^2-23+(-2)^311.|-14|*(-3/7)/1412.-62*(-1/2)^2-(-3)^2/(-1/2)^3*(-3)13.(-1)^(1997)-(1-0.5)/(-1/4)14.(-1)^3-(-8)+(-3)^3/((-2)^5+5)15.-10+8/(-2)^2-(-4)*(-3)16.-49+2*(-3)^2-(-6)/(-1/9)17.-14+(1-0.5)*1/3*(2*(-3)^2)18.(-2)^2-2*((-2)^2-3*4)/519.5*(-6)-(-4)^2/(-8)20.(-3/4)^2+(-2/3+1)*821.(7/12-5/6+3/4)*(-12)/622.(-5)*(-4)^2-0.25*(-5)*(-4)^2/823.(-1)^2*(-2)24.-42*((-7)/6)+(-5)^3-3/(-2)^325.6-(-12)/(-2)^226.(-48)/8-(-5)/(-12)^227.42*(-2/3)+(-3/4)/0.2528.(-81/9)/(-3)^229.-2*((-3)^2)-((-3)^3)/330.(-5)*6+(-125)/(-5)^331.-0.25*(-5)*4*(-1/25)32.-12+((21-2)/6)+(-3)^21.18 - 6 ÷ 3Simplify: 18 - 2 = 162.3 + 22 × (-2) × (-3)Simplify: 3 + 132 = 1353.(-9) × (-4) + (-60) ÷ 12Simplify: 36 + (-5) = 314.8 + (-3) × 2 × (-2)Simplify: 8 + 12 = 205.(-4) ÷ (-3/4) × (-3)Simplify: 4 × (-3) = -126.36 × (11/22 - 3/5)Simplify: 36 × (1/2 - 3/5) = 36 × (-1/10) = -3.67.(-3)2 × [-2/3 + (-5/9)]Simplify: 9 × (-1/3) = -38.100 ÷ (-2)2 - (-2) ÷ (-2/3)Simplify: 100 ÷ 4 - 3 = 229.(-1/3) ÷ (-1/2/3) - 4 × (-1/3)2Simplify: (-1/3) ÷ (-2/3) - 4 × 1/9 = 3/2 - 4/9 = 17/1810.12.7 ÷ (-8/19) × 3Simplify: 12.7 ÷ (-24/19) = -9.962511.321/2 × 3 + 6Simplify: 160.5 × 3 + 6 = 481.512.(-) (-8 + (-5))Simplify: -(-13) = 1313.-2 - 3/2Simplify: -4.514.23 ÷ [-2 - (-4) × (5/8)] ÷ (-7/8)Simplify: 23 ÷ [-2 + 10/8] ÷ (-7/8) = 23 ÷ [-1/4] ÷ (-7/8) = -6415.-72 + 2 × (-3)2 + (-6) ÷ (-1/3)2Simplify: -72 + 18 + (-6) ÷ (1/9) = -72 + 18 - 54 = -10816.8 - (-25) ÷ (-5)Simplify: 8 - 5 = 317.(-2) × 32 - (-2 × 3)2Simplify: -64 - 36 = -10018.(-60) × (35/4 + 6)Simplify: -60 × 47/4 = -70519.(-1347/6 - 20 + 5 - 12) × (-15 × 4)Simplify: (-1347/6 - 27) × (-60) =20.-13 - 2 × (-1)3Simplify: -13 + 2 = -1121.(-3/4)2 × (-2/3 + 1) Simplify: 9/16 × 1/3 = 3/1622.6 + 22 × (-3)Simplify: 6 - 66 = -6023.-10 + 8 ÷ (-2) - 4 × 3 Simplify: -10 + 4 - 12 = -1824.-15 - [(-0.4) × (-2.5)]5 Simplify: -15 - 1 = -1625.(-8) × 5 - 40Simplify: -4026.-20 ÷ 5 × 1/4 + 5 × (-3) ÷ 15 Simplify: -4 + (-1) = -527.-23 ÷ 13 × (-11)2 ÷ (12)2 Simplify: -23/156 × 121/144 = -121/4828.(-1)25 - (1 - 0.5) × 1/3Simplify: -1 + 1/6 = -5/629.(-1.2) ÷ (-1/3) - (-2)Simplify: 3.6 + 2 = 5.630.-3[-5 + (1 - 0.2 ÷ 3/5) ÷ (-2)] Simplify: -3[-5 + (1 - 2/3)] = -3[-3/3] = 331.-2/5 + (517/8 - 6 + 12) × (-2.4) Simplify: -2/5 - 31.5 = -157/10复有理数的乘除、乘方运算测试题一、填空题(每小题3分,共30分)1.3×(-2)= -6,(-6)×(-1)= 6.2.(-3)^2的底数是3,结果是9;-3^2的底数是-3,结果是-9.3.(-)÷(+14)= -955.07,-(+8)÷(-1)= 8,(+)÷(-22)= -.4.(-1)÷(+3/14)= -22/3,(-49/3)÷(+22)= -49/66,(-2)÷(+5/3)^2= -18/25.5.(-1)×(-33)= 33,(-1)×(-53)= 53.6.-1×(-2.4)×(-6/5)= 2.88.7.-32×(-5)^2÷(-2)^3= -100.8.我国省的面积约为3.6×10^5平方公里.9.+1/14的倒数是14,-2的倒数是-1/2.10.用">" "<" 填空:① 23.22② (-2) < 3③ 32.22④ (-2)3.(-2)2二、判断题(每小题1分,共5分)11.错误,任何数除以0都是未定义。
二次根式计算专题训练附答案

二次根式计算专题训练一、解答题(共30小题)1.计算:(1)+;(2)(+)+(﹣).2.计算:(1)(π﹣3.14)0+|﹣2|﹣+()-2.(2)﹣4﹣(﹣).(3)(x﹣3)(3﹣x)﹣(x﹣2)2.3.计算化简:(1)++(2)2﹣6+3.4.计算(1)+﹣(2)÷×.5.计算:(1)×+3×2(2)2﹣6+3.6.计算:(1)()2﹣20+|﹣|(2)(﹣)×(3)2﹣3+;(4)(7+4)(2﹣)2+(2+)(2﹣)7.计算(1)•(a≥0)(2)÷(3)+﹣﹣(4)(3+)(﹣)8.计算::(1)+﹣(2)3+(﹣)+÷.9.计算(1)﹣4+÷(2)(1﹣)(1+)+(1+)2.10.计算:(1)﹣4+(2)+2﹣(﹣)(3)(2+)(2﹣);(4)+﹣(﹣1)0.11.计算:(1)(3+﹣4)÷(2)+9﹣2x2•.12.计算:①4+﹣+4;②(7+4)(7﹣4)﹣(3﹣1)2.13.计算题(1)××(2)﹣+2(3)(﹣1﹣)(﹣+1)(4)÷(﹣)(5)÷﹣×+(6).14.已知:a=,b=,求a2+3ab+b2的值.15.已知x,y都是有理数,并且满足,求的值.16.化简:﹣a.17.计算:(1)9+5﹣3;(2)2;(3)()2016(﹣)2015.18.计算:.19.已知y=+﹣4,计算x﹣y2的值.20.已知:a、b、c是△ABC的三边长,化简.21.已知1<x<5,化简:﹣|x﹣5|.22.观察下列等式:①==;②==;③==………回答下列问题:(1)利用你观察到的规律,化简:(2)计算:+++…+.23.观察下面的变形规律:=,=,=,=,…解答下面的问题:(1)若n为正整数,请你猜想=;(2)计算:(++…+)×()24.阅读下面的材料,并解答后面的问题:==﹣1==﹣;==﹣(1)观察上面的等式,请直接写出(n为正整数)的结果;(2)计算()()=;(3)请利用上面的规律及解法计算:(+++…+)().25.计算:(1)6﹣2﹣3(2)4+﹣+4.26.计算(1)|﹣2|﹣+2(2)﹣×+.27.计算.28.计算(1)9+7﹣5+2(2)(2﹣1)(2+1)﹣(1﹣2)2.29.计算下列各题.(1)(﹣)×+3(2)﹣×.30.计算(1)9+7﹣5+2(2)(﹣1)(+1)﹣(1﹣2)2《二次根式计算专题训练》参考答案与试题解析一.解答题(共30小题)1.计算:(1)+=2+5=7;(2)(+)+(﹣=4+2+2﹣=6+.2.计算:(1)(π﹣3.14)0+|﹣2|﹣+()﹣2=1+2﹣﹣4+9=12﹣5;(2)﹣4﹣(﹣)=2﹣4×﹣+2=+(3)(x﹣3)(3﹣x)﹣(x﹣2)2=﹣x2+6x﹣9﹣(x2﹣4x+4)=﹣2x2+10x﹣133.计算化简:(1)++=2+3+2=5+2;(2)2﹣6+3=2×2﹣6×+3×4=144.计算(1)+﹣=2+4﹣2=6﹣2.(2)÷×=2÷3×3=2.5.计算:(1)×+3×2=7+30=37(2)2﹣6+3=4﹣2+12=146.计算:(1)()2﹣20+|﹣|=3﹣1+=(2)(﹣)×=(3﹣)×=24(3)2﹣3+=4﹣12+5=﹣8+5(4)(7+4)(2﹣)2+(2+)(2﹣)=(2+)2(2﹣)2+(2+)(2﹣)=1+1=27.计算(1)•(a≥0)==6a(2)÷==(3)+﹣﹣=2+3﹣2﹣4=2﹣3(4)(3+)(﹣)=3﹣3+2﹣5=﹣2﹣8.计算:(1)+﹣=+3﹣2=2;(2)3+(﹣)+÷=+﹣2+=.9.计算:(1)﹣4+÷=3﹣2+=3﹣2+2=3;(2)(1﹣)(1+)+(1+)2=1﹣5+1+2+5=2+2.10.计算:(1)﹣4+=3﹣2+=2;(2)+2﹣(﹣)=2+2﹣3+=3﹣;(3)(2+)(2﹣)=12﹣6=6;(4)+﹣(﹣1)0=+1+3﹣1=4.11.计算:(1)(3+﹣4)÷=(9+﹣2)÷4=8÷4=2;(2)+9﹣2x2•=4+3﹣2x2×=7﹣2=5.12.计算:①4+﹣+4=4+3﹣2+4=7+2;②(7+4)(7﹣4)﹣(3﹣1)2=49﹣48﹣(45+1﹣6)=﹣45+6.13.计算题(1)××===2×3×5=30;(2)﹣+2=×4﹣2+2×=2﹣2+=;(3)(﹣1﹣)(﹣+1)=﹣(1+)(1﹣)=﹣(1﹣5)=4;(4)÷(﹣)=2÷(﹣)=2÷=12;(5)÷﹣×+=4÷﹣+2=4+;(6)===.14.已知:a=,b=,求a2+3ab+b2的值.解:a==2+,b=2﹣,则a+b=4,ab=1,a2+3ab+b2=(a+b)2+ab=17.15.已知x,y都是有理数,并且满足,求的值.【分析】观察式子,需求出x,y的值,因此,将已知等式变形:,x,y都是有理数,可得,求解并使原式有意义即可.【解答】解:∵,∴.∵x,y都是有理数,∴x2+2y﹣17与y+4也是有理数,∴解得∵有意义的条件是x≥y,∴取x=5,y=﹣4,∴.【点评】此类问题求解,或是转换式子,求出各个未知数的值,然后代入求解.或是将所求式子转化为已知值的式子,然后整体代入求解.16.化简:﹣a.【分析】分别求出=﹣a,=﹣,代入合并即可.【解答】解:原式=﹣a+=(﹣a+1).【点评】本题考查了二次根式性质的应用当a≥0时,=a,当a≤0时,=﹣a.17.计算:(1)9+5﹣3=9+10﹣12=7;(2)2=2×2×2×=;(3)()2016(﹣)2015.=[(+)(﹣)]2015•(+)=(5﹣6)2015•(+)=﹣(+)=﹣﹣.18.计算:.解:原式=+()2﹣2+1﹣+=3+3﹣2+1﹣2+=4﹣.19.已知y=+﹣4,计算x﹣y2的值.【分析】根据二次根式有意义的条件可得:,解不等式组可得x的值,进而可求出y的值,然后代入x﹣y2求值即可.【解答】解:由题意得:,解得:x=,把x=代入y=+﹣4,得y=﹣4,当x=,y=﹣4时x﹣y2=﹣16=﹣14.20.已知:a、b、c是△ABC的三边长,化简.【解】解:∵a、b、c是△ABC的三边长,∴a+b>c,b+c>a,b+a>c,∴原式=|a+b+c|﹣|b+c﹣a|+|c﹣b﹣a|=a+b+c﹣(b+c﹣a)+(b+a﹣c)=a+b+c﹣b﹣c+a+b+a﹣c=3a+b﹣c.21.已知1<x<5,化简:﹣|x﹣5|.解:∵1<x<5,∴原式=|x﹣1|﹣|x﹣5|=(x﹣1)﹣(5﹣x)=2x﹣6.22.观察下列等式:①==;②==;③==…回答下列问题:(1)利用你观察到的规律,化简:(2)计算:+++…+.【分析】(1)根据观察,可发现规律;=,根据规律,可得答案;(2)根据二次根式的性质,分子分母都乘以分母两个数的差,可分母有理化.【解答】解:(1)原式==;)(2)原式=+++…+=(﹣1).23.观察下面的变形规律:=,=,=,=,…解答下面的问题:(1)若n为正整数,请你猜想=﹣;(2)计算:(++…+)×()解:原式=[(﹣1)+(﹣)+(﹣)+…+(﹣)](+1)=(﹣1)(+1)=()2﹣12=2016﹣1=2015.24.阅读下面的材料,并解答后面的问题:==﹣1==﹣;==﹣(1)观察上面的等式,请直接写出(n为正整数)的结果﹣;(2)计算()()=1;(3)请利用上面的规律及解法计算:(+++…+)().=(﹣1+﹣+…+﹣)()=(﹣1)(+1)=2017﹣1=2016.25.计算:(1)6﹣2﹣3=6﹣5=6﹣;(2)4+﹣+4=4+3﹣2+4=7+2.26.计算(1)|﹣2|﹣+2=2﹣﹣2+2=;(2)﹣×+=﹣×5+=﹣1+=﹣.27.计算.=(10﹣6+4)÷=(10﹣6+4)÷=(40﹣18+8)÷=30÷=15.28.计算(1)9+7﹣5+2=9+14﹣20+=;(2)(2﹣1)(2+1)﹣(1﹣2)2=12﹣1﹣1+4﹣12=4﹣2.29.计算下列各题.(1)(﹣)×+3=﹣+=6﹣6+=6﹣5;(2)﹣×=+1﹣=2+1﹣2.30.计算(1)9+7﹣5+2=9+14﹣20+=;(2)(﹣1)(+1)﹣(1﹣2)2=3﹣1﹣(1+12﹣4)=2﹣13+4=﹣11+4.。
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Key to task-based reading:(1) 本文讲述不同国家的新年传统、时间、起源和具体的活动。
理解全文,并注意有些词的词性变化,在文章里查找同源词。
1. Date2. Origins3. Meanings/Effects4. rich5. festival/ celebration6. symbol7. pouring8. follow9. enjoying 10. happiness (2) 本文讲述中国学生讲英语口语的四大问题并提出对应的建议。
学生答题时应先看图表了解大体结构,然后快速浏览文章里的相似句子,不必通读全文。
1. limitation2. enlarge3. spoken4. worries5. nervousness6. important7. Ignorance8. Lack9. passive 10. advantage (3) 本文讲述中国的父母对孩子的教育十分重视,花钱在子女教育上很大方,他们认为花费越高,教育越好,但他们忽视对孩子自信,自重等个性品质上的培养。
1. Attitude2. devoted3. Measures4. foreign5. Belief6. investment7. Problems8. Reasons9. instead 10. Solutions (4) 本文讲述美国人生活条件很好,但也号召大家采取一些措施使污染变小,节约能量,这对人们的身体有好处。
1. diets2. much3. properly4. transportation5. automobile6. foot7. environment8.consumed9. energy 10. attitude(5) 本文讲述了艺术家要具备一些基本素质如:有创造力、充分利用自然景色的能力、努力理解现实的能力等等。
建议学生在理解表格基础上再看文章比较容易理解文意并作出相应的表达。
1. creative2. produce/create3. unusual/new4. scenery5. without6. interpret/ express7.aspect/angle8. effort9. explanation/understanding 10. unchanged(6) 本文讲述现在家长和孩子的关系并不像人们想象的那样糟,而是比较和谐,作者并且举了几个例子来印证这个观点。
建议学生在阅读时列出对比信息。
1. deal2. tend/prefer3. obey4. refuse5. opposite6. harmony7. way8. suggest9. regard 10. did(7) 本文讲述了一个人从孩子到大人成长中对周围世界的幻觉发生变化的过程。
对于短小文章适合通读全文。
1. childhood2. besides3. gone4. curious5. opposite,6. disappointing7. back8. entertaining9. regains 10. bigger(8) 本文讲述了中国的服务型行业-旅游业发生的变化。
建议学生先看图表再查找相关信息。
1. curious2. traffic3. go4. measures/steps5. language6. few7. needed8. behavours9. used 10. attention (9) 本文主要讲述了抽烟在中国所造成的危害非常严重,并呼吁中国政府采取措施在公共场合戒烟。
1. situation2. consist3. young/teenager4. half5. know6. worried7. campus8. allowed9. passed 10. look (10) 本文讲述了很多产品的包装本身也是一种广告形式以及包装广告对消费者产生的影响。
建议学生最好在理解全文的基础上答题。
因为此篇要让学生写标题,这是较难的阅读任务。
1. Packaging is advertising2. Means3. Small gifts4. Dishes5. Economy Size6. Free7. the last money 8. Facts/ Truths 9. cost10. the basic unitKey to writing:练习一With the sharp rise of the cost of college education, students have a few ways to pay for their college tuition and fees. Many students just let their parents pay the tuition. Some students may apply for a bank loan and others will try to find part time jobs both on the campus and out of campus. Apart from this, many good students will win a scholarship. In this way they can pay at least part of their tuition.As to me, I will let my parents pay half of my tuition because they are not rich enough. Besides my studies, I will take up a part time job as a tutor teaching some high school students maths, physics and English, as I'm very good at the subjects. Of course I will work very hard at my lessons so that I can win a scholarship. I think that’s enough to pay for my college education.练习二Just Try to Relax During ExamsAs you know, most of us middle school students feel somehow nervous whenever we’re taking an important exam. There is no doubt that exams are important to us students, but it’s more important to have a right attitude towards them. As a matter of fact, exams are no more than a means of checking. Therefore there is no need to worry too much about the results. Study hard every day and make good preparations. Only in this way can we avoid suffering from the pressure of exams.We’d better go out for a walk or do some outdoor exercises during an exam. Besides, enough sleep can make us full of energy and make it possible for us to perform well in the exam. A warm bath or a cup of milk before going to bed might help us to have a sound sleep. So, my suggestion is: Don’t worry about it, and just try to relax whatever happens.练习三Dear editor,I’m a high school student and my name is Li Hua. During the winter vacation, I went to stay with my grandma in the countryside. One day, I was amazed to see thousands of egrets flying to the mountains around the village. The villagers said it was because the environment was getting better that these egrets chose to stay here.But two weeks later, I was shocked to find lots of the egret eggs, stolen; many nests destroyed and even scores of egrets killed without mercy. It was not until the government officials and the policemen came that such wrong doings were stopped.To prevent such things from happening again, I think we should make the public know the importance of protecting rare animals and take active and effective measures to protect them.Yours,Li Hua练习四The Chinese government has decided to develop central and western China. This part of China includes 9 provinces and autonomous regions and one municipality, covering an area of 5.4 million square kilometers with a population of 285 million. The government will pay special attention to its transportation. Some high ways and railways will be built. To protect the nature, peasants will return farmland to forest. Also measures will be taken to prevent pollution. Western China is rich in natural resources which can be exploited and made full use of. To meet the need of development, all kinds of experts and skilled workers are to be brought in. We have every reason to believe that the government will be a great success. As a result of the great project, central western regions of China will surely achieve better and faster development in the new century. The people will have a better life and China will surely be richer and stronger.练习五Boys and girls,We high school students do have some growing pains, but we can get rid of them correctly and wisely. First, some of us are upset about their body styles and looks. It’s unnecessary and it’s not important at all. We needn’t care about it. It is one’s inner beauty that matters. Second, we sometimes seem to be misunderstood by our teachers, parents and classmates. Facing this, we can find a proper time to have a heart-to-heart talk with them, trying to remove the misunderstanding. Some of us have fewer friends. I think being open-minded and friendly will do you good. Third, we may fall behind others, which makes us stressed. Actually we can encourage ourselves to work efficiently, full of determination. Last, some of us don’t have much pocket money, so they feel unhappy. Isn’t it strange? So long as we have some, that’s enough. And we can learn to spend money!That’s all. Thank you.练习六Dear Peter,I’d like to tell you that our school has worked out a new program.The purposes of the program are to make our school more beautiful, to make the air cleaner and fresher, and to turn our school into a better place for us to study and live in.According to the program, we will plant different kinds of trees, flowers and grass in and around our school .A botanical garden will be built for us to visit and practice in .Besides, we are to build a small garden in which we can do some reading and take a rest .What’s more,some statues of famous people will be set up to encourage us to work harder.……Welcome to our school if you have any chance.Yours,Xiao Ming练习七Dear editor,I have recently made a survey among 30 boys and 30 girls in my class about their purpose of getting on the internet. The girls’ favorite is chatting, but few boys like it. What the boys like to domost is playing games and the girls also like it. Both boys and girls like to read news or send e-mails on th e internet. Maybe they think it’s the most convenient way to get information from keeping in touch with friends. As for studying, the numbers of boys and girls are equal, but altogether only several of them will use internet as a tool to study.In my opinion, useful as the Internet is, the students had better make better and wiser use of it. Otherwise, it’s impossible for us to benefit from it. Moreover, I also hope the parents will pay enough attention to their children using the Internet in their spare time.练习八Dear John,Very pleased to know that you are coming to study in Beijing and it is really a good idea to improve your Chinese before the new term begins next September.Here is an introduction to a school of Chinese. Compared with the other schools, I think it is a suitable one that you can go to. First, it is very convenient for you to get there by No. 16 bus. Next, the classes are very small. There are 24 teaching hours a week. After class, you can enjoy sports and activities with other students. Staying with a Chinese family will provide you with a chance to practice your Chinese and know more about the Chinese family life. The time will suit you and only 200 yuan is paid per month. I’ll get in touch with them if you are interested in this school.Looking forward to hearing from you soon.Yours,Li Hua练习九In the above cartoons, a young woman happily eats bananas and throws the peels on the street, unaware of the fact that such actions not only pollute the environment but also bring dangers to others. A disabled man struggles to properly pick up the peels she has left behind and put them in the dustbin.In my opinion, des pite the girl’s beauty, it is the disabled man who is truly beautiful. Being well dressed is of great importance in keeping a good appearance. However, we should always keep this in mind: True beauty comes from one’s actions. The old man is displaying a mo re beautiful virtue even though he is disabled, compared with the young girl.While most of us enjoy pretty appearances, I think it is more important to have a clean and beautiful soul. Only such souls can create a beautiful society.练习十Never before h as the people’s livelihood been cared about as it is today. To ensure and improve the people’s livelihood, the government is taking a series of measures.As is shown in the pictures, the government will provide pension, Medicare and training for jobs. To people’s delight, various laws are to be perfected. Moreover, some legal service centers will be set up to protect people’s rights. What’s more, to make sure that people can live safely and peacefully, the government will make great efforts. By the way, the government will try its best to stop water and air pollution, so people can enjoy clean water and fresh air.Personally the people in our country will surely enjoy a happy life if all the measures above are to be taken effectively. Under the leadership of our Party and with the efforts of our people, Ibelieve our future life will be better and better and our country will be stronger and stronger.。