在探究“光对鼠妇生活影响”实验中，将实验盒一边遮光，另一边不遮光，这是为了[]A．提供一种无光的条件B．便于观察C．控制变量D．设置一个对照实验-七年级生物

更多内容推荐

• --Is New Zealand a big country?--No, New Zealand only has two islands.One is North Island, andis Sou
• ------What kind of ticket do you have?------ We have tickets$105 the hard sleeper.A. at; forB. for;
• ----_______ do you have out with your friends?----Once a week.A．How longB．How oftenC．How manyD．How s
• ---_______do you go to the theatre, Li Lei? ---Once a month.A．How oftenB．How many timesC．How longD．H
• Let’s go to the ______ to study for the exam.A．factoryB．hospitalC．cinemaD．library-九年级英语
• —How do you like the book you read yesterday?—Oh! It’s one of ______ books I’ve ever read.A．interest
• — How old is his father?— He is thirty ________.A．yearsB．years oldC．oldD．year old-七年级英语
• -My father with my grandparents _______ Shanghai.-Really? _______ will they come back?A．have been to
• — is it from your home to the centre of the town?— Only 10 minutes on foot.A．How oftenB．How soonC．Ho
• 某实验小组在探究“光对鼠妇生活的影响”时做了如下实验，请分析回答下列问题。(1)用硬纸板制成一个长方形的纸盒（上方没有盖），将纸盒分成长度相等的两部分，一部分用黑纸包好-七年级生物
• --What's theof the mountain?--It's 2,000 meters high. A．highB．hightC．heightD．heigh-七年级英语
• The old man lives ________in a _________ house. He sometimes feels__________.A．alone ; alone; lonely
• — How much of his speech do you think you have understood?— . I wish I had worked harder.A．Quite a
• --Excuse me, teacher, can I ask you something about the last class? I didn’t quite understand it.--S
• —Is the woman who walked past just now your teacher?—Yes. She teaches ______ music.A. us B. ourC. ou
• It takes rile an hour ______ to school by bike．A．getB．to getC．getting D．gets-七年级英语
• —Excuse me. I wonder if you can provide me ______ some information about the fantastic sights here.—
• ----Walking is _____legs and hearts.---Yes, we should often walk.A.bad forB.good forC. good at-八年级英语
• --With the _____________ of science and technology, people can talk with each other much more conve
• — Jenny, I need some milk.—OK, Mum.____ do you need?A．How longB．How farC．How oftenD．How much-七年级英语
• --Psychologists think it's bad tobecause thinking too much about oneself may cause depression.-
• --Beijing is really an old city and there're many places of interest.--So it is. Why not stay h
• I gave her _____ address and she gave me ______.A．my ; herB．my; hersC．mine; herD．mine; hers-七年级英语
• —________ are we going to meet?— In front of the shopping center.A．WhenB．WhereC．HowD．Why-七年级英语
• They told me it would be cheap, but , it cost me nearly 5,000 dollars.A．in factB．for exampleC．of cou
• 鼠妇是一种灰褐色或黑色的小动物，我们经常可以在花盆、石块下面发现它们，它们的身体扁平，呈长椭圆形，有多对足。当我们搬开花盆和石块，鼠妇很快就爬走了，这是为什么呢?-七年级生物
• — Let’s go to the community if it tomorrow.— But nobody knows if it tomorrow.A．won’t rain; rainsB．do
• There is going to _____ an art exhibition on Friday.[ ]A. isB. be C. haveD. has-八年级英语
• -Before I enter the competition, I want to know the __________.-The winner can get a gold medal.A．p
• — ________ is your school?—I can’t remember it well. I________ for ten years.A．How big, have left B．
• The policeman asked the child ________ cross the street ________ the traffic lights turned green.A．n
• —Mum , could you buy me a dress like this?---- Certainly, we can buy _____ one than this, but ______
• If you can’t decide which of the two books to borrow, why don’t you take _____?I won’t read them thi
• Old people shouldn’t . In fact, they have stronger and clearer minds.A．look downB．be looked downC．lo
• —Let me help you carry the box, Granny.—Thank you, Li Ping. It’s very nice you me.A．of; to helpB．for
• We’re doing job we all feel proud of ourselves.A．such meaningful; andB．such meaningful; thatC．such a
• —________ does it take to go to Hangzhou from Wenzhou by train?—It usually takes about three hours.A
• — ________ have you learned to play the piano?— ________ five years ago.A．How long, ForB．How often,
• Put on your coat, ________ you may catch a cold.A．andB．soC．butD．or-八年级英语
• Please _________ my keys here, I need them.A．bringB．answerC．foundD．lost-七年级英语
• Although he’d eaten up two bowls of rice, he still didn’t feel ____.A．enough fullB．full C．enough ful
• The old men should be treated with .A．kindB．kindnessC．kindlyD．kinder-八年级英语
• It’s getting warmer and warmer, and _____ are turning green.A．tree leafB．trees leafsC．trees leavesD．
• ________ does it take you to do your homework every day?A．How oftenB．How longC．How manyD．How far-七年级
• --- do you take exercise?--- Twice a week.A．How manyB．How muchC．How oftenD．How long-七年级英语
• Our talent show got _____ a great success _____ we became popular stars in our school.A．so, thatB．su
• Don’t worry about ________. He can do it well by himself. A．heB．himC．hisD．her-七年级英语
• The little boy is crying at first, but at last, he become ______.A．sadB．goodC．happyD．happily-八年级英语
• Hurry up! If we miss ______ last bus, we’ll have to get home by______ taxi.A．a;/B．the; aC．the;/D．a;
• —Excuse me. ________ is the sports center from here?—About five kilometers.A．How longB．How farC．How