问题
填空题
踢出去的足球在草坪上慢慢停下来，这是受到 _________ 力的作用，同一个物块抛出后在冰上滑行的距离比在水泥地上的远，这是因为在冰上受的摩擦力 _________ 于在水泥地上受到的摩擦力．
答案
摩擦；小
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踢出去的足球在草坪上慢慢停下来，这是受到 _________ 力的作用，同一个物块抛出后在冰上滑行的距离比在水泥地上的远，这是因为在冰上受的摩擦力 _________ 于在水泥地上受到的摩擦力．
摩擦；小
| 完形填空 阅读下面短文,掌握其大意,然后从每题所给的A、B、C、D 四个选项中选出可以填入空白处的最佳选项。 | |||
| From Monday to Friday most people are busy working or studying. But in the evening and weekends they are free and 1hemselves. Some watch television or go to the movies, other 2 sports. This is decided by their own 3. There are many different ways to spend our 4 time. Almost everyone has some kind of 5 : it may be something from collecting stamps to 6 model planes. Some hobbies are very 7, but others don’t cost anything at all. Some collections (收藏) are worth 8of money, others are valuable (有价值的) only to their owners. I know a man who has a coin collection worth several 9dollars. A short time ago he bought a rare (罕见的) fifty-cent piece which 10him $250! He was very happy about this collection and thought the piece was all right. On the other hand, my youngest brother collects match boxes. He has almost 600 of them. But I wonder 11they are worth any money. However, 12my brother they are quite valuable 13makes him happier than to find a new match box for his collection. That’s what a hobby means. I think, it is something we 14o do on our free time just for the 15of it. The valuable in dollars is not important, but the pleasure it gives us is. | |||
| ( ) 1.A. love ( )2.A. look like ( )38.A. lives ( )4.A. working ( )5.A. hobby ( )6.A. make ( )7.A. interesting ( )8.A. a little ( )9.A. thousand ( )10.A. paid ( )116.A. that ( )12.A. to ( )13.A. Everything ( )14.A. have ( )15.A. money | B. work B. take care of B. interests B. free B. thing B. making B. exciting B. a few B. thousands B. cost B. if B. on B. anything B. need B. work | C. enjoy C. think about C. jobs C. own C. job C. makes C. cheap C. a lot C. thousands of C. took C. what C. with C. nothing C. refuse C. fun | D. play D. take part in D. things D. whole D. way D. make D. expensive D. a number D. thousand of D. spent D. why D. in D. something D. like D. time |