生物技术可以帮助人类战胜能源危机。（）-八年级生物

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• 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
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• The headmaster asked the pupils __ too late on weekdays. [ ]A. not get upB. not to get upC. don'
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• 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
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• 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
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• 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
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• （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
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• —Hi, Julie. Let'sgoout _______. —Sorry, there _______ alotofhomeworkformetodo. [ ]A. play; are
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• 基本语法1. I think Erin should tell her friend Anna not __________ (be) late for class again.2. ________
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• 被誉为“水稻杂交之父”的是（）。A．李时珍B．孟德尔C．达尔文D．袁隆平-七年级生物
• It is really kind_______ you_______ help me with my math.[ ]A. for; forB. to; to C. of; to D. for; t
• ________ is easy ________ the question.[ ]A. That, to answerB. That, answering C. It, to answerD. It
• (2010日照)3.科学家把美洲拟鲽抗冻蛋白质基因转入西红柿，成功培育出了抗冻西红柿。科学家把上述基因转入西红柿所利用的生物技术是A．组缎培养B．嫁接技术C．发酵技术D．转基因-七年级生物
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• —Don't forget __________ your homework, John. —OK. I'll do it right now. [ ]A. doingB. doC
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• 当实验结果不符合假设时，应该怎么做A．放弃实验验不再探讨此问题B．修改实验数据C．重新提出假设再进行实验D．不再做此实验直接得出结论-七年级生物
• He needs ______ you some questions.[ ]A. askingB. asksC. askedD. to ask-八年级英语
• Be carefulthe street when the traffic light is red.[ ]A. don’t crossB. not crossC. not acrossD. not