设备选型的依据是企业对生产产品的工艺要求,设备选型重点要考虑设备的( )等。
A.使用性能
B.经济性
C.可靠性
D.合理性
E.可维修性
参考答案:A,B,C,E
Facing the economic depression, every possible means ______ this year to save the company
from going bankrupt.[ ]
A. has been tried
B. has tried
C. have been tried
D. have tried
雷锋同志出任过()人民代表。