高中题库

[试题]单细胞铜绿微囊藻大量繁殖可形成水华．受到广泛关注。下面是有关铜绿微囊藻的研究．请回答问题：(1)利用配制的X培养液培养铜绿微囊藻8 d.每天定时测定其细胞数量，发现铜绿徽囊藻数量呈指数增长.短时间内产生大量个体，这是因为铜绿微囊藻具有____等特性。(2)某同学用x培养液培养铜绿微囊藻时.加人粉绿狐尾藻(一种高等水生植物).结果铜绿微囊藻生长受到明显抑制.重要的原因是这两种生物在利用____等资源时存在显著的竞争关系。(3)也有人提出假设：粉绿狐尾藻能产生化学物质抑制铜绿微囊藻的生长。请利用下列实

[单选题]无胸腺裸鼠是一种无毛变异小鼠，先天性无胸腺，常作为医学生物学研究中的实验动物。下列表述中错误的是A．无胸腺裸鼠具有正常的体液免疫功能B．无胸腺裸鼠应饲养在无菌环境中C．无胸腺裸鼠对异体组织无排斥反应D．人类癌细胞可在无胸腺裸鼠体内增殖

[单选题]养鸡场鸡舍中清晨和傍晚用稳定的灯光延长光照时间．以提高产蛋率。下列分析正确的是A．延长光照刺激可直接通过体液调节提高产蛋率B．鸡的产蛋率与体内的雌激素水平密切相关C．鸡的产蛋行为受神经调节和体液调节共同作用D．鸡的产蛋行为受遗传因素和环境因素共同影响

[单选题]探索遗传物质的过程是漫长的．直到20世纪初期，人们仍普遍认为蛋白质是遗传物质。当时人们作出判断的理由不包括A．不同生物的蛋白质在结构上存在差异B．蛋白质与生物的性状密切相关C．蛋白质比DNA具有更高的热稳定性，并且能够自我复制D．蛋白质中氨基酸的不同排列组合可以贮存大量遗传信息

[单选题]某种蛋白酶是由129个氨基酸脱水缩合形成的蛋白质．下列叙述正确的是A．该蛋白酶分子结构中至少含有l29个氨基和l29个羧基B．该蛋白酶溶液与双缩脲试剂发生作用.产生紫色反应C．利用透析法纯化该蛋白酶时，应以蒸馏水作为透析液D．用含该蛋白酶的洗衣粉去除油渍，效果比其他类型加酶洗衣粉好

[单选题]下列关于人体细胞结构和功能的叙述，错误的是A．在mRNA合成的同时就会有多个核糖体结合到mRNA上B．唾液腺细胞和胰腺细胞中高尔基体数量较多C．核孔是生物大分子可以选择性进出的通道D．吸收和转运营养物质时，小肠绒毛上皮细胞内线粒体集中分布于细胞两端

[单选题]In Paragraph 2, the author uses jazz an example toA． compare it with rock musicB． show music identifies a societyC． introduce American musical traditionsD． prove music influences people’s lifestyles

[单选题]下列关于核酸的叙述中，正确的是A．DNA和RNA中的五碳糖相同B．组成DNA与ATP的元素种类不同C． T2噬菌体的遗传信息贮存在RNA中D．双链DNA分子中嘌呤数等于嘧啶数

[单选题]34.____twice,thepostmanrefusedtodeliverourlettersunlesswechangedourdog.A．BeingbittenB．BittenC．HavingbittenD．Tobebitten

[单选题]What is the main purpose of the passage?A．To show us the hidden beauty in our world.B．To warn us not to get lost in the fantasy wonderC．To argue against the misuse of the sense of wonderD．To discuss the influence of the world of make-believe

[单选题]If our sense of wonder relics totally on the world of make-believe. we will_______.A．fail to appreciate the joy in our livesB．be confused by the world of make-believeC．miss the chance to recognizc the fantas worldD．be tranped by other worlds exsting

[单选题]What can we infer from the underlineed sentence in Paragraph 3?A．People are fra less familiar with the world of fantasy.B．The world around us could serve as a sound of wonder.C．The world of fantasy can be mirred by a small and lively pond.D．Modern te

[单选题]E． Humans are naturally drawn to other life forms and the worlds outside of our own. We take delight in the existence of creatures and even whole socicties beyond our everyday lives.This sense of wonder is universal look at the efforts that scientist

[单选题]第二节 完形填空 (共20小题：每小题1.5分，满分30分) 请阅读下面短文，掌握其大意，然后从36~55各题所给的四个选项(A、B、C和D)中，选出最佳选项，并在答题卡上将该选项的标号涂黑。Introduction to letters to SamD．ear Reader,Please allow me to tell you something before you read this book. When my （36） ,Sam,was born , my heart was fill

[单选题]Which of the following would be the best title for the passage?A．A Unique Attraction for Wildlife LoversB．Calapagos as a Paradise for AdventurersC．Charles Darwin as a Symbol of CalapagosD．A Successful Example of Wildlife Protection

[单选题]Your stay on the islands will be most impressive mainly because of .A．the beautiful sea viewsB．Darwin’s inapiring tripC．a clder view of animalsD．various daring activities

[单选题]Whieh of the fotlowing plavs a role in making the islands “a pradise for wikllife”?A．Animals on theis lands feed on grass.B．Lood go mthent forbids killing wildlife.C．Fccple nninot visit the islands as they wash.D．fourists are not allowed to torch the

[单选题]Many buildings in the city need repairing, but the one ______first is the library.A．repaired B.being repairedC．repairing D.to be repaired

[单选题]D． Sitting on the peaceful coast of the Calapagon Islands. Ecuador , watching the sun move quietly into the sea, you shouldn’t forget the Charles Darwin (1809 – 1882) arrived here in 1835. He famous work. On the Origin of Species. You can certainly f

[单选题]H．ave you played baseball before?We need one more player.____.I like ball games ,no i believe it will be to learn baseball.A．Sometimes B.Not reallC．Never mind D.That's cool

[单选题]The passage is mainly developed by _______.A．analyzing causesB．making comparisonsC．examining differencesD．following the time order

[单选题]The news shocked the public, to great concem about students’ safety at school.A． having led B. ledC． leading D. to lead

[单选题]A．t the meeting place of the Yangtze River and the Jialing River________,one of the ten largest cities in ChinaA．lier Chongqing B.Chongqing liesC．doer lie Chongqing D.doer

[主观题]第二节 书面表达（满分25分） 假设你是李华，于2010年6月3日搭乘国外某航空公司航班(flight number BA793)回国后，发现遗失了一个行李箱(suitcase)。现请用英文给该航空公司写一封信，请他们帮你寻找。信件要点包括：·陈述写信原因·简要描述该行李·说明其重要性·期待回复并表示感谢注意：1. 词数100左右。2. 信件格式已为你给出。3. 请在答题卡上作答。第86题：假设你是李华，于2010年6月3日搭乘国外某航空公司航班(flight number BA793)回国后，

[单选题]—Why do you want to work for our company?—This is the job that I for.A．looked B.am to lookC．had looked D. have been looking

[主观题]trust, and you will anioy every minute that. you spent with them. 85. ____________

[单选题]Women’s clothes still button from the left today because______.A．abouting men’s style. is improper for womenB．manufacturers should follow standardsC．modern women dress themselvesD．customs are hard to change

[单选题]What do we know about the rich men in the 17th century?A．They tended to wear clothes without bottons.B．They were interested in historical matters.C．They were mostly dressed by servants.D．They drew their swords from the left.

[单选题]Today, we will begin____________we stopped yeaterday so that no will be left out.A．when B.whereC．how D.what

[主观题]some advices, In a word, friends are those you like and 84. ____________