珍·古道尔4岁半时，很想知道母鸡身上哪里有一个可以让鸡蛋“钻”出来的洞。她最好采用什么方法？A．测量法B．观察法C．实验法D．调查法-七年级生物

更多内容推荐

• That is all they can do _____ the poor students in that village school. [ ]A. help B. to help C. hel
• This is the best time ________ books.[ ]A. readingB. readC. to readD. reads-八年级英语
• I'm really happy___ the tickets.[ ]A. havingB. have C. has D. to have -八年级英语
• 在科学探究过程中，为了保证实验的科学性A．不需要设置对照实验，太麻烦B．只需要一组实验就可以了C．对照实验可有可无D．需要设置一组对照实验-七年级生物
• 用所给词的适当形式填空。1. I can't find the museum. What should I ___________ (do)?2. I need some more mone
• What are you going _____ when you grow up?[ ]A. beB. to beC. do D. does -八年级英语
• We have worked for three hours. Now let's stop _____ a rest. [ ]A. had B. have C. to have D. ha
• 学习生物学的方法很多，要了解本市名贵珍稀树木的种类和分布，我们采用的最佳方法是A．观察B．探究实验C．调查D．资料分析-七年级生物
• —What would you like ______? —Maybe stamps. They ______ beautiful.[ ]A. to collect; lookB. to collec
• My mother asked you _________ when you come back.[ ]A. ring her up B. to ring her upC. to ring up he
• It is fun_____ an e-mail from China.[ ]A. to get B. get C. gets-八年级英语
• He planned _____ the work before Wednesday but failed. [ ]A. to finish B. finishing C. finished-八年级英
• 下列对于科学观察的认识，错误的是A．观察时按一定的顺序进行B．边观察边思考C．全面观察与重点观察相结合D．只要看就行了-七年级生物
• When you go to school this Sunday, don't forget _____ me my backpack.[ ]A. bring B. to bring C.
• 探究酒精对水蚤心率的影响：实验室常用体积分数为95％的酒精配制不同浓度的酒精溶液。学生在实验时配制如下不同浓度梯度的酒精溶液：1％、3％、5％、8％、10％、15％、20％等。在15℃左-八年级生物
• 生物学家通常利用观察、调查、实验等方法来研究生物。（）-七年级生物
• 完成“探究光对鼠妇生活的影响”实验后，应如何处理鼠妇（）。A．顺手扔掉B．直接处死C．放归自然D．恒温培养-七年级生物
• 蝙蝠常生活在黑暗的洞中，但它们仍可“看”到各种障碍物，因为它们是利用超声波来探测目标的，人类模仿蝙蝠的这一特点，发明了（）A．雷达B．手电筒C．望远镜D．电视-七年级生物
• Don't forget_______ your new MP4 to school tomorrow. [ ]A. bringB. to bring C. takeD. to take-八
• I'm glad _____ the news. [ ]A. hear B. to hear C. hearingD. hears -八年级英语
• 科学实验往往需要设置重复组，其数字结果应当取各重复组的最小值。……………（）-七年级生物
• 观察下面四幅图，与其所运用的生物技术不能对应起来的是（）A．薄壳建筑—仿生技术B．试管婴儿—发酵技术C．多莉绵羊--克隆技术D．超级鼠--转基因技术-九年级生物
• 生物技术可以帮助人类战胜能源危机。（）-八年级生物
• 在设计“探究光对蟑螂生活的影响”实验时，下列条件的选择不同的是（）A．温度B．湿度C．食物D．光照-七年级生物
• When you leave, don’t forget ______ goodbye to your parents. [ ]A. saysB. saying C. saidD. to say-八年
• I'm hungry now. Let's stop _____.[ ]A. having a meal B. having a restC. to have a mealD. t
• I think it'll be a good way _____ to the theatre.[ ]A. by bus B. on a bus C. take a bus D. to t
• It is our duty_our hometown clean and beautiful. We must do something for it.[ ]A. to keepB. keepsC.
• Granny often tells us _______ water in our daily life.[ ]A. saveB. savingC. to saveD. saves-八年级英语
• Her parents are strict with her and they don't allow her __ out late. [ ]A. stayB. stayedC. sta
• The headmaster asked the pupils __ too late on weekdays. [ ]A. not get upB. not to get upC. don'
• 在“探究光照对黄粉虫生活影响”的实验中，正确的顺序是（）。①提出问题②制定计划③作出假设④实施计划⑤表达交流⑥得出结论A．①②③④⑤⑥B．⑥⑤④③②①C．①③②④⑤⑥D．①③②④⑥⑤-七年级生物
• The teacher asked us ______ the playground after the sports meeting. [ ]A. clean B. to clean up C. c
• 当苹果从树上掉下，砸到牛顿时，牛顿心里想：“为什么苹果会往下掉，而不往上飞呢？”，这是科学探究中的哪一步骤？（）。A．提出问题B．得出结论C．作出假设D．实验-七年级生物
• 在科学研究和社会调查中，常采用五点取样法，正确的五点取样法是（）-七年级生物
• March is the best time_______ China.[ ]A. visitB. visits C. to visit D. visiting-八年级英语
• 用所给词的适当形式填空。1. Please ask the children_________( not play) in the street．2. Let's ________ (rid
• I don't know when it is the right time _____ the meeting.[ ]A. to leave B. leave C. leave for D
• 为了研究“唾液及牙齿的咀嚼”对淀粉的消化作用，某同学设计并完成了下列实验方案，然后将4支试管放到37℃温水中5分钟，取出后分别加入2毫升的碘液，摇匀，观察试管中的颜色变化-七年级生物
• —Don't forget _____ my dog, OK?—OK.[ ]A. feeding B. to feedingC. feed D. to feed-八年级英语
• The man followed the boy _________ what he wanted _________ in the small room.[ ]A. to see; to do B.
• My mother asks meTV before finishing my homework. [ ]A. not to watch B. not watch C. not watching-八年
• Would you like ______ Chinese stamps?[ ]A. collectB. to collectC. collectingD. collected-八年级英语
• （每空2分，共8分）“探究影响鼠妇分布的环境因素”是我们学习生物学的第一个探究实验，通过实验，让同学们了解探究实验的一般过程，体会控制变量和设计对照实验的重要性。请你根-七年级生物
• (6分〉请你根据进行“光对鼠妇生活的影响”探究活动的体会，认真回答下列问题：（1）提出的问题是。（2）作出的假设是。（3）探究过程中，实验的变量是。为了保证实验结果的不同只能是-九年级生物
• Withlessthan10minutesleft,thestudentfounditdifficult _____ theirwritingontime.[ ]A.finishingB.finish
• It's difficult_____ this work.[ ]A. do B. does C. didD. to do-八年级英语
• 用所给词的适当形式填空。1. Some people are making rice dumplings_____ (celebrate) this holiday.2. People _____ (
• ㈠春天的时候许多同学都会养蚕，那么多的蚕宝宝养在一起，它们之间是否是一个具有社会行为的群体?为什么?(4分)㈡实验探究(11分)蚯蚓是常见的一种动物。请根据所学知识回答下-八年级生物
• —Hi, Julie. Let'sgoout _______. —Sorry, there _______ alotofhomeworkformetodo. [ ]A. play; are