壳式油冷却器主要由()、管束、壳盖等组成。
参考答案:壳体
On the Eve of the Spring Festival, we Chinese people like to play with fireworks, and the noise doesn’t ____ until after midnight.
A.die away
B.die off
C.die out
D.die down
何谓成分过冷?成分过冷对晶体生长形态有何影响?