假如我们把笔尖看作一个点，当笔尖在纸上移动时，就能画出线，说明了（），时钟秒针旋转时，形成一个圆面，这说明了（），三角板绕它的一条直角边旋转一周，形成一个圆锥体，这说-七年级数学

更多内容推荐

• It’s useless envying others their success.It’s time you ________ hard.A．must workB．went to workC．wor
• I think the Brazilian team is the strongest team and there is ______ that it will win the 2010 World
• _____ more than 100 million references to the word“tuhao” on social media since early September．A．It
• —Nancy, have you gone over your lessons after school? — Not yet. — Please remember: __________A．Many
• It was some time _____ I realised the fact that life had become difficult for many villages in weste
• It was not until the teacher had explained it three times _______ how to work out the problem.A．did
• As far as I see, ______ is no possibility ________ she will lend me a hand.A．it; thatB．there; thatC．
• Not only ________ give people relaxation and pleasure, but ________ increase their knowledge of any
• Although Fleming discovered Penicillin, it was over a decade ______ someone else turned it into the
• ---He seems to be a teacher.---______. He has been a teacher for 20 years.A．So he doesB．So he isC．So
• The new bridge is ______ the one built last year. A．three times width ofB．three times that ofC．three
• —How long do you think it will be _______ we get the loan?—Perhaps two or three months.A．untilB．befo
• As we all know，dark glasses can ________ the eyes from strong sunlight.A．preventB．careC．helpD．protec
• ----Who are you going to havethis letter for you?----My secretary.A．typeB．typedC．been typedD．been ty
• ----Is it the first time you _______ Beijing?----No. But the first time I ______ here, the city wasn
• ___________ I toured Zhang Jiajie, I was deeply impressed with its beautiful scenery.A．For the first
• _________ others whenever you can _______you will feel happy.A．Help; andB．To help, andC．Helping; so
• I was about to get on the bus _________someone called.A．asB．whenC．beforeD．while-高一英语
• －What do you think of the party last night?－Wonderful! It’s years I enjoyed myself so much. A．afterB
• The speech by the mayor of Shanghai before the final voting for EXPO 2010 is strongly impressed ___
• It’s very________ that, in many schools, the students are going to spend less time in doing homework
• Find ways to praise your children often，____you’ll find they will open their hearts to you． A．tillB．
• —Are you still working in that company, Mary?—No, it is ten months ____ I worked there．A．afterB．that
• The village has developed a lot ________ we learned farming two years ago.A．whenB．whichC．thatD．where
• -- - Alison, I’m sorry. I can’t come to the wedding with you tomorrow morning. -- ________? -- My g
• It is_______ he often fails in exam_______ makes his parents worried about him.A．because, thatB．that
• — Look! You’ve made the same mistake again!— Oh, not again! _________ such a mistake.A．I will always
• ---Tom has been fired by his boss． --- ? As far as I know, he is a hardworking and considerate fello
• He had little idea that it was getting so late, _____?A．didn’t heB．wasn’t itC．did heD．was it?-高三英语
• I really don’t know _____ I put my wallet after I paid the bill.A．where was itB．it was where thatC．w
• He said that only after he went abroad _______ what his motherland meant to him.A．he realizedB．he ha
• It’s _______ that you’ve got a headache; you drank too much last night.A．no doubtB．no wonderC．no use
• — Did you take enough money with you? — Yes, but I spent ________ I had expected.A．not so many asB．a
• Only when your identity has been checked, ___________.A．you are allowed in B．you will be allowed in
• ____ it is to play football on such a cool afternoon.A．What a funB．How a funC．What funD．How fun-高三英语
• The USA is a large country in ________ many different dialects are spoken.A．thatB．whichC．whereD．it-
• Some young people in America are expected to leave ______ could be life’s most important decision---
• ______ is widely acknowledged that all mankind is created ______.A．It, equalB．It, equallyC．This, equ
• The Great Wall is _________________ tourist attraction that millions of people pour in every year.A．
• The Smiths have moved to Miami, Florida, ____ they dreamed long of living in. A．whereB．in whichC．wh
• My English teacher’s humor was ___make every student burst into laughter.A．so as toB．such as toC．suc
• Come and see me whenever ______.A．you are convenientB．you will be convenientC．it is convenient to yo
• Can you lend me the book ____the other day?A which you talked B that you talked C you talked D you t
• I don’t think ____ is any need for a guide on our journey.A．itB．thisC．thereD．that-高二英语
• . --- Steve has got the first prize in the maths contest. --- ______ is no wonder that he looks so h
• The reason ________ he was late for the meeting was _______ his car had broken down on the road. A．w
• No one can be sure _____ in a million years. A．what man will look like B．what will man look like C．m
• One of the men held the view_________ the reporter stated was not true.A．whichB．thatC．whatD．that wha
• ---Look! The two boys always come in and go out in pairs. ---That’s really as a saying goes, “______
• ____ talking with his Grandma, he went away without saying a word.A．Tiring withB．Tiring ofC．Tired wi