题目

国家游泳中心（俗称“水立方”）采用了高分子膜材料“ETFE”，该材料是四氟乙烯（CF2=CF2）与乙烯（CH2=CH2）发生聚合反应得到的高分子材料，下列说法不正确的是（          ） A．“ETFE”分子中可能存在“﹣CH2﹣CH2﹣CF2﹣CF2﹣”的连接方式 B．合成“ETFE”的反应为加聚反应 C．CF2=CF2和CH2=CH2均是平面形分子 D．CF2=CF2可由CH3CH3与F2两种物质直接反应制得We went to play against a team from a country school. They didn’t come1the match began. They looked2than we thought. They wore dirty T-shirts and blue jeans and looked like farm boys. We thought they3saw a basketball before. We felt that we didn’t4any practice to play with such a team. It was very late so they couldn’t have any time to practice. The match began. One of our boys5the ball and he tried to give it to another one. But from out of nowhere a boy in a T-shirt6the ball and he quickly and beautifully got the ball into our basket and had two points. They7us because they had another two points in a minute. Soon it was all over. The country team8the match. Of course we knew that there was still another team9than any good team. But the important lesson we learned this time was: One can’t tell a man or a team by the10.1.A.whenB.soC.untilD.at2.A.strongerB.youngerC.worseD.better3.A.neverB.oftenC.sometimesD.always4.A.haveB.makeC.useD.need5.A.gotB.playedC.tookD.carried6.A.caughtB.changedC.heldD.kicked7.A.laughedB.frightenedC.admiredD.smiled8.A.lostB.wonC.gotD.had9.A.worseB.lessC.betterD.more10.A.T-shirtB.appearanceC.nameD.points