将叶片的叶脉切断，产生的影响是[]A．光合作用不能顺利进行B．物质运输受阻C．叶片不能进行正常伸展D．以上说法均正确-七年级生物

更多内容推荐

• 下列图形绕着直线l旋转360°，能得到锥体的是[]A.B.C.D.-七年级数学
• 将一个直角三角形（如图所示）绕它的最长边旋转一周得到的几何体为图中的[]A.B.C.D.-七年级数学
• 长方形绕其一边旋转一周形成的几何体是（），直角三角板绕其一直角边旋转一周形成的几何体是（）．-七年级数学
• 如图，这个几何体是由哪个图形绕虚线旋转一周形成的[]A．B．C．D．-七年级数学
• 如图，长方形ABCD的长AB=4，宽BC=3，以AB所在直线为轴，将长方形旋转一周后所得几何体的主视图的面积是______．-数学
• 汽车的雨刷把玻璃上的雨水刷干净属于的实际应用是（）A．点动成线B．线动成面C．面动成体D．以上答案都不对-数学
• 如图把一个圆绕虚线旋转一周，得到的几何体是[]A．B．C．D．-七年级数学
• 一个直角三角形绕其中一条直角边旋转一周所形成的几何体是_________．-七年级数学
• 图形是由_________，_________，_________构成的．-七年级数学
• 如图所示①是由若干个小正方体所搭成的几何体，②是①从上面看到的图形，则①从左面看到的图形是①②[]A.B.C.D.-七年级数学
• 下面图形如图所示绕直线l旋转一周后形成什么图形？-七年级数学
• 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
• A pair of Li Ning trainers costs about 200 yuan, while a similar pair of Nike costs five times .A．th
• 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---