气体灭火系统中年度检查要求进行泄漏报警装置报警定量功能试验,检查钢瓶的比列为()。
A.80%
B.100%
C.70%
D.90%
参考答案:B
找出句子中错误的一项并在横线上改正。
( ) 1. Did you had breakfast in the morning?
A B C
( ) 2. There are the train.
( ) 3. It's about five hundred year old.
( ) 4. I'm puting a film in my camera.
( ) 5. These child are flying kites.