【单选题】Adams hadn't a ______ what the speaker was talking about most of the time because the class was in chaos.
【单选题】在微量法测熔点实验中,下列哪一种装置是没有的?
【简答题】链应用广泛,主要应用在一般机械中传递运动和动力,也可用于输送场合。其工作速度v ≤ 。
【单选题】What is Americans'idea about time?
A.
Time is very important to them.
C.
They have no idea about time.
【简答题】情志为病,喜则()。|情志为病,悲则()。A. 气上B. 气下C. 气缓D. 气结E. 气消