()是二系悬挂中的关键部件,是影响车辆运行平稳性的关键因素。
A、空气弹簧
B、抗侧滚扭杆
C、差压阀
D、高度调整阀
参考答案:A
请用所给单词的正确形式填空。
1. My father is (heavy) than my uncle.
2. His desk is taller than (you).
3. The panda is fun, but you are (funny).
4. Tom doesn't like to go to the movies. He (want) to play football.
5. We can (learn) a lot from the hero.
6. —What do you think of comedies (喜剧)?
—Yes. They're very (funny).
7. How many (child) are there in the park?
8. How big are your little brother's (foot)?
9. A sperm whale has 50 (tooth).
10. His brother is a good (run).
如图(a)所示,滑轮质量、摩擦均不计,质量为2kg的物体在F作用下从静止开始向上做匀加速运动,其速度随时间的变化关系如图(b)所示,由此可知(g取10m/s2)在0至4s这段时间里F做的功的平均功率为 W, 3s末F的瞬时功率大小为 W。