动物与人们的生活息息相关，既有有利的一面，也有有害的一面。苍蝇、老鼠人见人厌，你能发现它们有利的一面吗?-八年级生物

更多内容推荐

• —I forget ______ the window when I left. —It doesn’t matter. Let me help you. [ ]A. close B. closing
• 实验中如果结果和假设不符合，正确的处理方法是（）A．修改结果，使其与假设相符B．依据实验结果下结论C．修改实验过程，使其与假设相符D．修改假设，重新做试验-七年级生物
• The doctor told the boytoo much junk food because he is really fat.[ ]A. don’t eatB. not to eat C. e
• 科学探究的正确顺序是①提出问题②制定计划③作出假设④实施计划⑤得出结论⑥表达和交流A．①②③④⑤⑥B．①③②④⑤⑥C．③②①④⑤⑥D．②⑥①④③⑤-七年级生物
• 尝试探究（6分）桃花鱼为腔肠动物门水螅纲的一个小类群，栖息于淡水中，因其形状酷似桃花而得名，其中文名是桃花水母。生长于三峡库区姊归县归州镇鸭子滩的桃花水母是极为稀有-七年级生物
• I wanted Jim _________ shopping with me, but he refused.[ ]A. don't go B. not goC. not to goD.
• 图中是显微镜下观察到的几种微小生物，据图陋答问题。ABCDE（1）这几种生物在身体结构层次上的共同特点是__________________（2）试根据细胞结构的特点，将图中生物进行分类。①属-七年级
• He was too old ___ by himself.[ ]A. walk B. walking C. to walk D. not to walk-八年级英语
• I can't go home now because I forgot_____ umbrella_____ me.[ ]A. to bring; toB. bringing; toC.
• He planned __________ the work before Wednesday but failed.[ ]A. to finishB. finishingC. finished-八年
• Your friend _____ more if he wants to be thinner.[ ]A. needs exerciseB. needs exercisingC. need exer
• 海鲜馆里有一道菜叫“西施舌”（一种贝类）炒“九层塔”（一种香料植物），媒体报道九层塔中含有黄樟素，小明看了报道以后：①小明猜测微量黄樟素会导致癌症②于是，他准备了两组老鼠，-八年级生物
• 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
• He chose__ a red shirt, because she likes red.[ ]A. to buyB. buyC. buyingD. bought-八年级英语
• 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