除油罐进行除泊操作之前应控制好收油液面，使污油能够进入（）。
A、收油罐
B、集油槽
C、回收池
D、出口
参考答案：B
— Volunteering is becoming _____ popular in China.
— Yeah, people are now aware that helping others is helping themselves. [ ]
A. naturally
B. successfully
C. splendidly
D. increasingly
土中的气体如果处于封闭状态，则土不易压实，形成高压缩性土。
