DDZ-III型仪表标准电流值是()。
A.0-10mA
B.4-20mA
C.1-5MA
D.0-20Ma
参考答案:B
We ______ 1, 000 English words since we ______ to this school. [ ]
A. learn; come
B. have learned; came
C. have been learning; came
D. have learned; come
在房地产投资项目可行性研究中,要对现金流量进行折现分析,这是投资项目经济评价的( )原则的要求。
A.有无对比
B.以动态分析为主
C.以定性分析为主
D.收益与风险权衡