科学家为证实自己所提的假设，常以什么作为重要的支持依据？（）A．观察B．假设C．实验D．推论-七年级生物

更多内容推荐

• It’s our duty ______the environment.[ ]A. protectB. to protect C. protectingD. of protecting-九年级英语
• My father wants __________a movie.[ ]A. to go B. goes to C. see D. to see -七年级英语
• 用括号内所给单词的适当形式填空。1. She wants ______ (read) a book. 2. Let's go and ______ (see) our grandma. 3.
• He is always the last one _____ school.[ ]A. gets B. to getC. get to D. to get to-七年级英语
• My mother wants______ a new coat for me.[ ]A. buyB. to buyC. buys D. buying-七年级英语
• —Mary was heard ______ just now. What happened?—John was telling a joke. [ ]A. cry B. to cryC. laugh
• Some of the girls in my class run in the morning _________a good shape.[ ]A. to keep B. keeping C. k
• 某小组在进行测定花生果实长度取样时，提出了四种方法，其中正确的方法是A．从大花生中取40枚较大的，在小花生中取40枚较小的B．从大花生中取1枚较大的，在小粒花生中取1枚较小-八年级生物
• We didn’t expect ____________ you here.[ ]A. see B. to see C. seeing-九年级英语
• He agreed ______ to work in Beijing.[ ]A. to goB. goingC. wentD. go-七年级英语
• The aim of soccer is for players _____ the ball into the goal. [ ]A. kicked B. kicking C. to kickD.
• Mr Green has enough houses for us _____.[ ]A.live B.to liveC. livingD. to live in -九年级英语
• It's time_____ school.[ ]A. go to B. go C. to go D. to go to-七年级英语
• 如果让你调查本地市树的分布情况，第一步你将怎样做A．制订合理的调查方案B．选取调查样本C．如实记录调查过程D．设计调查线路-九年级生物
• I don't like______. I want______ basketball.[ ]A. going to a movie; to playB. to go to movie; t
• --What did your sister say to you last night?---She asked me _____ my father her secret.[ ]A. to tel
• It takes us 2 hours_________to the zoo.[ ]A.ride B.to ride C.rode D.riding-八年级英语
• 久置空气中的烤面包片，难以生出霉菌。小林同学观察到这一现象，提出：水分对霉菌的生活有影响吗？这属于实验法研究步骤中的A．发现并提出问题B．作出假设C．设计实验方案并设施、-八年级生物
• We should encourage the children affected by the earthquake _____ happy to face the life in future.
• —Does his mother encourage him _____the piano?—Of course she does.[ ]A. to play B. playing C. playC.
• We can’t afford ______ such an important customer. [ ]A. upsetB. to upsetC. upsetting-九年级英语
• The teacher told us ______Exercise 1 in our exercise books.[ ]A. do B. to do C. doing D. does -九年级英语
• It's necessary _____ speaking English every day.[ ]A. practice B. practices C. practicing D. to
• My friends often invites me ______ meals in their house.[ ]A. haveB.to haveC.having D. has-八年级英语
• To speak seems to be more difficult than _________.[ ]A. doing B. to do C. doD. done-九年级英语
• 选词填空 care about have on become interested in show off for example 1. It's important to eat plen
• 如果实验结果与假设出现矛盾，下列做法错误的是（）A．修改假设B．修改实验数据C．重新进行实验D．进一步查找相关资料-八年级生物
• 在调查校园生物时，以下同学的做法正确的是A．小明发现好几株他不认识的植物，于是把它们拔出来，带回家研究B．小浩发现一只老鼠，觉得太恶心就不记录了。C．小美拔开草丛，一只-七年级生物
• Do you want _____ to a movie?[ ]A. goB. goesC. to goD. going-七年级英语
• Students are often told _____ at people who are in trouble.[ ]A. not to smile B. to smile C. not to
• 在实际工作中，通常使用的方法是（）。A．观察法B．实验法C．调查法D．多种方法并用-七年级生物
• 为及时掌握干旱对我区农业生产造成的损失情况，采用下列（）方法较为适当A．模拟实验B．实验法C．调查法D．观察法-七年级生物
• 有关实验技能的说法中，正确的观点是：A．在科学探究中，提出的假设总是与实验结果相一致B．科学探究通常包括提出问题、作出假设、实验、得出结论和表达交流等方面C．在探究光对-七年级生物
• 在科学研究和社会调查中（空气污染尘埃粒子），常采用五点取样法，正确的五点取样法是-七年级生物
• We need __________a Chinese History Club.[ ]A. startingB. to startC. to be startedD. starts-九年级英语
• Let's ask him _____ his best photos tomorrow. [ ]A. bring B. to bringC. takeD. to take -八年级英语
• Sarah's mother often asks her not ________ at night(夜晚).[ ]A. goes outB. go outC. to go out-七年级
• But first you have ______ your room.[ ]A. to cleanB. to cleaningC. clean toD. not to clean-八年级英语
• It’s impossible ____ a taxi on such a rainy day.[ ]A. for getting B. of get C. to get D. to getting-
• —Jim decided ___________ us in the game.—Oh, very good![ ]A. joining B. to join C. joined D. join -八
• Do you want _____? [ ]A. to go to a movies B. go to a movie C. to go to a movieD. go to movies-七年级英语
• A lot of farmers refused _____ the new machine, but the engineer persuaded them _____ his invention.
• 在测量空气的相对湿度时，如何减小误差，提高测量数据的可靠性？A．测量一次B．测量多次取最大值C．测量多次取最小值D．测量多次取平均值-七年级生物
• We sang for the old woman __________.[ ]A. cheer up herB. cheer her upC. to cheer up herD. to cheer
• I hear Hawaii is a good place _______ sightseeing. [ ]A. to go to B. to go C. going to D. going -八年级
• 观察法是进行科学研究的一种方法，下列说法错误的是()A．要全面、客观、细致地观察B．科学观察要有明确的目的C．观察必须借助显微镜才能进行D．观察时要认真思考，并如实做好记录-七年级生物
• 五点取样法是抽样计数的方法之一，五点的位置应该是（）A．一块地方内随机五点B．一块地方内等距离五点C．面积大小相同的五点D．对角线中心和对角线上与中心等距离的四点-七年级生物
• The government plans ___________ a square here.[ ]A. to build B. buildingC. buildD. built-八年级英语
• -There is nobody here. Let’s play football.-No, we can’t. My father often tells me ____ in the stree
• —Linda, I am very thirsty. —Let's go to the nearest supermarket _____ some drink. OK?[ ]A. buyB