问题
不定项选择
如图所示，位于固定斜面上的小物块m受到一水平向右的推力F的作用。已知物块m沿斜面加速下滑，现保持F的方向不变，使其减小，则加速度
A．一定变小
B．一定变大
C．一定不变
D．可能变小，可能变大，也可能不变
答案
答案：B
搜题请搜索小程序“爱下问搜题”
如图所示，位于固定斜面上的小物块m受到一水平向右的推力F的作用。已知物块m沿斜面加速下滑，现保持F的方向不变，使其减小，则加速度
A．一定变小
B．一定变大
C．一定不变
D．可能变小，可能变大，也可能不变
答案：B
| Cloze test. 完形填空。 |
| Miss Zhao is one of the most popular teachers in the school. Yesterday she came into the 1 with a big smile on her face. She said to her 2 that she was 3 to see they did well in the sports meeting. But 4 was not pleased to see the classroom last Saturday not as 5 as usual. She hoped they would clean the classroom every day. Wei Hua was on 6 yesterday. She 7 everyone was at school except Lin Tao. Then she told Miss Zhao about their 8 to the Great Wall last Sunday. Luckily the weather was 9 . They played games and had a picnic there. After Wei Hua 10 her talk, Miss Zhao began her lesson. |
| ( ) 1. A. shop ( ) 2. A. students ( ) 3. A. angry ( ) 4. A. she ( ) 5. A. dark ( ) 6. A. time ( ) 7. A. say ( ) 8. A. visit ( ) 9. A. bad ( ) 10. A. started | B. classroom B. teachers B. sorry B. I B. old B. duty B. says B. music B. fine B. had | C. park C. workers C. glad C. we C. large C. foot C. saying C. clock C. rainy C. finished | D. office D. doctors D. sad D. he D .clean D. top D. said D. football D. windy D. gave |