一个自然生态系统中,肉食性动物总比植食性动物的数量 。(选填“多”或“少”)
少
用所给词的正确形式填空。
1. That ______ (sound) interesting.
2. ______ you ______ (have) a tennis racket?
3. My brother ______ (have) a baseball bat.
4. We have many ______ (club) in our school.
5. Let's watch ______ (they) on TV.
6. She ______ (play) sports every day.
7. Can you ______ (bring) your new picture books here?
8. ______ your friend ______ (like) sports?
9. Let ______ (we) play tennis.
10. That's an ______ (interest) computer game.
在区间临时停车或在车站无动力停留时随车机械师应做哪些工作?