燃煤长期贮存时变质程度高的煤,挥发份有所减少,对变质程度低的煤,挥发分则有所增加。()
参考答案:错
According to the rules, the librarian will have you _______ if you don’t return the books borrowed from the library in time.
A.to be fined
B.fined
C.fine
D.being fined
FADEC是
A、全权数字发动机电子控制器
B、是机械液压结构
C、AB都对
D、以上都不对