李时珍在研究药物时，采用的方法主要是观察法。-七年级生物

更多内容推荐

• 鼠妇喜欢生活在阴暗潮湿的环境中，影响它生活的非生物因素除光、温度以外，还有土壤的潮湿程度等。请你利用下侧甲、乙、丙三个实验装置图回答问题：（1）如果你要探究“光对鼠妇-七年级生物
• Do you want ____ a new book?[ ]A．buyingB．to buyC．buysD．bought-八年级英语
• I'm sorry ______ that bad news.[ ]A. hearB. hearingC. to hearD. heard-八年级英语
• It's important for us ______ more trees every year．[ ]A．to plant B．plantingC．to cuttingD．cuttin
• 用所给词的适当形式填空。1. Your clothes are the same as my_______(friend).2. He needs_______(get)a part-time job
• 我们在利用调查的方法进行科学探究时，首先要（）A．明确调查目的和调查对象B．制定调查方案C．设计调查记录表D．整理和分析数据-生物
• 下列是“探究某种加酶洗衣粉使用的最适温度”的实验设计，最合理的是（）A．加酶洗衣粉在30℃的水中洗涤效果没有45℃的好，说明45℃为最适温度B．在不同温度的水中，加入相同的污物及-七年级生物
• I want Jim ________ shopping ith me but he won'tdo so. [ ]A.to go B.goC.going D.goes-八年级英语
• Don't forget ____ the pen ____ him.[ ]A. to return, toB. to return, forC. returning, toD. retur
• My hobby isold coins.[ ]A. to collectB. collectedC. collectD. collects-八年级英语
• ①林奈A．DNA分子双螺旋②达尔文B．生物分类系统③哈唯C．血液循环④沃森和克里克D．物种起源与生物进化理论-七年级生物
• 在“探究不同植被对空气湿度的影响”的实验中，需要使用的实验器材是A．干湿计B．放大镜C．显微镜D．酒精灯-七年级生物
• Our teachers always tell usacross the street when the traffic light is red.[ ]A. not goB. don’t goC.
• It's dangerous for you _______ in the street.[ ]A. play B. to play C. playedD. playing-八年级英语
• Don't forget ______the door when you left![ ]A. closeB. to closeC. closingD. closes-八年级英语
• 某学习小组测量大小两种花生果实长度，在进行取样时，提出了四种方法，其中相对科学合理的是A．在大花生中取30粒较大的，在小花生中取30粒较小的B．在大花生中取1粒最大的，在-七年级生物
• I need the magazine,but I don't want _____buy it. I can borrow one from the library.[ ]A./B. to
• The old man is too tired _____ go any further.[ ]A. enoughB. can'tC. toD. so-八年级英语
• 小杉将调查的生物进行分类：鲫鱼、金鱼、螃蟹、苍蝇、老鼠等归为一类，荷花，玫瑰花，松树，黄金叶归为一类．小杉分类的方法是（）A．按照生物的形态结构B．按照生物的用途C．按照生-七年级生物
• —Li Lei, the summer vacation is coming. Where will you go?—I decide _____ to Mount Emei. [ ]A. go B.
• It's not right for you__________ the Internet without doing your homework.[ ]A. surf B. to surf
• This is a good piece of music for us to _____. [ ]A. dancing B. dancing toC. dance byD. dance to -九年
• —What can I dofamous?—You must study hard.[ ]A. becomeB. to becomeC. becameD. becoming-八年级英语
• There is nothing _______.[ ]A. worry about B. to worry C.to worried about D. to worry about-八年级英语
• 在《光对鼠妇生活的影响》的实验中，给鼠妇提供阴暗和明亮两种环境条件，观察鼠妇对环境的选择。这样设计的实验属于（）A．模拟实验B．对照实验C．直接实验D．检测实验-七年级生物
• The best way __________ the work is tostart at once.[ ]A. finishB. to finishC. finishingD. finishes-
• 小明同学为证明细菌对植物遗体的分解作用，想出了一个实验方案：将同一种树的落叶分成甲、乙两组，都进行灭菌处理，甲组放在无菌的条件下，乙组接种细菌后放在无菌的条件下，-八年级生物
• 下列方案是四个生物小组同学进行实验的设计思路，你认为正确的是()A．提出问题→作出假设→得出结论→设计、实施实验B．设计实验→提出问题→得出结论→作出假设C．提出问题→作出假设-七年级生物
• 被誉为“世界杂交水稻之父”的袁隆平爷爷，利用野生水稻经过多次杂交培育新品种，他采用的主要研究方法是()A．观察法B．调查法C．分类法D．实验法-七年级生物
• Dennis needs more time________ his homework tonight.[ ]A. finishing B. to finishC. finishesD. finish
• The teacher often tells us_____our classroom_____.[ ]A.to keep; to cleanB.keeping; cleaningC. tokeep
• 句型转换。1. My father lets me go out to play. (改为同义句) My father ________ _______ ________ go out to play
• He wanted Lucy______yesterday.[ ]A. comeB. came C. to come D. comes-八年级英语
• I have nothing_______for him today.[ ]A. sayB. said. C. to say-八年级英语
• I think that it's not hard _ English.[ ]A. to speakB. spokeC. speaking D. speak-八年级英语
• （7分）回顾探究“光对鼠妇生活的影响”活动过程，回答下列问题。（1）作出的假设是。（2）该实验中的变量是。（3）在设计实验时，要给鼠妇提供黑暗和明亮两种环境，以便对照。每个实验-七年级生物
• The man lost his money. But he _____ about it.[ ]A. not try to worryB. tried not to worryC. don'
• 李时珍是我国16世纪卓越的医学家、药学家，为了纠正古书中关于穿山甲捕食蚂蚁的错误说法，特地跑到山里，认真察看和记录穿山甲的生活习性。主要采用下列哪种方法进行研究()A-七年级生物
• 实验过程中，若实验假设与实验结果出现矛盾，下列相关做法错误的是()A．修改实验假设B．修改实验数据C．反复进行实验D．进一步查找相关资料-七年级生物
• Yang Liwei is the first man ________ the moon.[ ]A. to stepB. stepC. steppingD. steps-八年级英语
• My mother often tells me _______ my classmates when they need.[ ]A. helpB. to helpC. helpingD. helps
• The idea _________ useless.[ ]A. seemed to beB. seemed toC. seemed beD. seemed be to-八年级英语
• My hobby is ______ old coins. [ ]A. to collect B. collected C. collectD. collects-八年级英语
• 选择方框中的单词，并用其正确形式填空。ride, run, meet, happen, get,follow, buy,cut, land, jump1. The thief wanted _____
• 巴斯德鹅颈瓶实验成功的关键在于（）A选择好的肉汤作材料B实验态度认真C实验室条件好D设计的鹅颈瓶阻挡了细菌进入肉汤-八年级生物
• I am surprised that you won't go to college. [ ]A. to hearingB. hearingC. hearD. to hear-八年级英语
• 下列①-⑤为实验过程中的几个相关步骤，在实践操作中其排列次序正确的选项是()①发现并提出问题②设计和实施实验方案③分析实验现象④得出结论⑤作出假设A．①→②→③→④→⑤B．②→①→③→⑤→④C．①-七
• My mother wants me ______ milk every day. [ ]A. drink B. drinks C. drinking D. to drink. -八年级英语
• 句型转换。1. The policeman said,"Don't play football in the street,children!"(同义句转换) The p
• —I didn't see you at the meeting.—I had a bad cold. The doctor asked me _____in bed.[ ]A. stayi