正常生产中，会造成减压系统爆炸事故的原因有（）。
A.塔底液面过高
B.减压塔出现泄漏
C.真空度过高
D.塔底液面过低
参考答案：B
根据句意,用括号内所给词的适当形式填空:
1. Mr. Mott was very _____ (care) and broke the cup.
2. It often rains _____ (heavy) in summer.
3. Let's learn the _____ (forty) lessons today.
4. Do you know China's Four Great ______ (invent)?
5. He is much _____ (health) than his brother.
“俟二分二至以後，始转而从本令之王气”中的“二分”指（）、（），“二至”指（）、（）。（《秋燥论》）
