简述滑销系统的作用。
参考答案：
当透平受热后，使透平的动、静部分能够沿着预先规定的方向膨胀，保证动、静部分的对中不变，或变化很小。
That music by Micheal Jackson ____ beautiful.[ ]
A. sound
B. sounds
C. sounds like
D. looks like
根据图片内容写出正确的短语。
1. 2. 3.
4. 5.
1. I ____________ in the afternoon.
2. My mom ____________ very early (早早地) every day.
3. Do you want ____________?
4. Bob ____________ at 9:30 in the evening.
5. I’d like ____________ for lunch.
2.
3. 
5.