【判断题】当TTL与非门的输入端悬空时相当于输入为逻辑1。()
【判断题】采用顺序阀实现的顺序动作回路当中,其顺序调整压力应比先动作液压缸的最大工作压力低。()
【单选题】The same factors push wages mad prices up together, the one _________ the other.
【单选题】按照我国标准,下列电压不属于额定电压等级的是()。
【多选题】下列选项中属于我国安全电压额定值等级的是() ( )
【简答题】下列属于我国的额定电压等级的是( )。A. 3kV; B. 20kV; C. 22kV; D. 500kV;
【单选题】The author suggests that, to win the war against alcohol abuse,______.
A.
we should emphasize the harm of passive drinking
B.
it's important to change the current notion of alcohol
C.
alcohol should be treated the same way as smoking
D.
it's necessary to classify alcohol as an illegal drug
【判断题】The term “cognitivism” is often used loosely to describe methods in which students are asked to think rather than simply repeat.
【简答题】下列属于我国输电网额定电压等级的是( )。A. 110kV; B. 220kV; C. 320kV; D. 500kV;