气体灭火系统按防护对象的保护形式可以分为()。
A.全淹没系统
B.局部应用系统
C.管网灭火系统
D.预制灭火系统
E.组合分配灭火系统
参考答案:A, B
各类蔬菜最初在()时分苗,此时伤根最少,成活率最高。
She was()what she had written so as to make the theme stand out more clearly.
A.repairing
B.revising
C.remedying
D.reforming