【单选题】Where is the meeting room?
B.
Through the meeting room.
C.
Out of the door and at the right side.
D.
Near the door and at the left side.
【简答题】已知25 m ?2?10 n =5 7 ?2 4 ,求m、n.
【简答题】用简便方法计算下列各题. (1)825÷25 (2)47700÷900.
【单选题】—Did you have anyone ____________the meeting room? --Yes, I had the meeting room __________ .
【简答题】已知a 3 ?a m ?a 2m+1 =a 25 ,求m的值______.
【简答题】Where is the Association meeting held? [A] In Room 110. [B] In the meeting room. [C] In the auditorium. [D] In the staff room.
【判断题】提供与旅行有关的服务是旅行社的主要企业性质。 ( )
【单选题】只要企业存在固定成本,那么经营杠杆系数必()
【判断题】提供与旅行有关的服务是旅行社的主要企业性质。( )
【简答题】小幅面的激光切割机采用丝杠传动,大幅面的激光切割机采用齿轮齿条传动,这两种传动方式有什么不同,各有什么优缺点?