【简答题】我国国家标准将旅游资源分为8个主类。其中主类包括____、____、____、____、____、____、____、 ____。
【单选题】Everyone was tired, so Bill got up and made a motion that the remaining problems ______until next meeting.
C.
are not to be discussed
D.
would not be discussed
【单选题】This morning Tom got up ealier ___ be late for school.
【判断题】电容C是表征电容器存储能量本领的物理量。
【单选题】当减压阀出口压力低于调定压力时,减压口开度为( )