下列电压属于安全电压的等级是()。
A.50V
B.24V
C.12V
D.36V
E.220V
参考答案:B, C, D
Of the two..Australian students , Masha is ________ one. I think you can find her easily.
A, tallest B, the taller C. taller D. the tallest
()依法享受国家规定的职业病待遇
A.接触有害作业的工人
B.接触有毒有害的劳动者
C.职业病病人
D.工伤职工