【单选题】振荡回路中电流大,且频率较高。在此回路中所采用的紧固件,最好为( )。
【单选题】从状态图中可以看出电路共有4个状态,那么就要选用( )个触发器。
【判断题】蜗杆的轴心线应在蜗轮轮齿的对称中心平面内
【判断题】蜗杆副传动机构的装配,蜗杆的轴心线应在蜗轮轮齿的对称中心平面内。
【简答题】中频电源振荡回路中电流大,且频率较高。在此回路中所采用的紧固件,最好为()
【单选题】We didn't know what had happened to her until we () the accident in the newspaper.
【单选题】What had happened to the patients under study?
A.
They had just survived an accident.
B.
They had just had an operation.
C.
They had just injured their colons.
D.
They had just made some pouches.