装置长时间停电的现象有()。
A、所有机泵、空冷停运
B、DCS画面无显示
C、所有照明灯熄灭
D、装置内噪音减小
参考答案:A, B, C, D
The teacher would rather the boy ________ what she demands ________ him to set the bird ________ free .
A.to do ; of ; caught alive
B.did ; from ; being caught living
C.had done ; for ; caught lovely
D.did ; of ; caught alive
运动负荷试验后,正常冠状动脉血流通常增加________()
A.3~5倍
B.6~10倍
C.1~2倍
D.1~3倍
E.以上都不对