问题
选择题
| 伽利略的理想实验证明了（ ） ①要物体运动必须有力作用，没有力作用物体将静止 ②要物体静止必须有力作用，没有力作用物体就运动 ③要使物体由静止变运动，必须受不为零的合外力作用，且力越大速度变化越快 ④物体不受力时，总保持原来的匀速直线运动状态或静止状态 |
A．①② B．③④ C．①③ D．②④ |
答案
答案：B
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| 伽利略的理想实验证明了（ ） ①要物体运动必须有力作用，没有力作用物体将静止 ②要物体静止必须有力作用，没有力作用物体就运动 ③要使物体由静止变运动，必须受不为零的合外力作用，且力越大速度变化越快 ④物体不受力时，总保持原来的匀速直线运动状态或静止状态 |
A．①② B．③④ C．①③ D．②④ |
答案：B
| 完形填空。 | |||
| Dear Tony, My name is William.I'm from the USA. I can __1__ English and __2__ Chinese.Can you speak English very __3__ ? I think I can help you __4__ your English. I like music.I can sing __5__ I can play the piano. I __6__ the trumpet and the violin.but not very well.Can you play __7__ music instruments (乐 器)? I like sports , too. I can play soccer and now I'm __8__ my school soccer club. Do you __9__ any sports club? Please write soon! I really want __10__ something about you! Looking forward to (盼 望) your letter. Your friend, William | |||
| ( ) 1. A. speak ( ) 2. A. many ( ) 3. A. good ( ) 4. A. on ( ) 5. A. and ( ) 6. A. can play also ( ) 7. A. some ( ) 8. A. with ( ) 9. A. take ( ) 10. A. know | B. talk B. a little B. nice B. in B. but B. can also play B. a little B. for B. play B. to know | C. want C. a C. well C. for C. also C. also can play C. any C. of C. join C. join | D. have D. more D. interesting D. with D. too D. can too play D. a D. in D. do D. to join |