寿命相同的设备在租赁与购置的经济比选中，一般可采用( )。
A．增量收益率 B．内部收益率法C．净现值法 D．投资回收期法
参考答案：C
I will take a holiday with my family _______ I finish all the exams.
A．so that
B．as
C．as soon as
D．while
A group of crew members standing by in case of an emergency in order to assist other teams in action if necessary is a（）.
A.Fire team
B.Rescue team
C.Emergency team
D.Control team
