1kV以下电力系统,变压器低压侧,重复接地电阻不应大于()。
A、4Ω
B、5Ω
C、6Ω
D、10Ω
参考答案:D
下列哪些是治疗结核病时应首先选用的药物()
A.异烟肼
B.对氨基水杨酸钠
C.利福平
D.胺丁醇
E.氨硫脲
根据句意和汉语提示写出单词,完成句子。
小题1:Our school is very big and there are more than four _____________(千) students in it.
小题2:The Spring Festival usually comes in January or _____________(二月).
小题3:The_____________(努力) you work , the more progress you’ll make.
小题4:Poor Jack felt _____________(紧张不安的) when he went to his manager’s office.
小题5:Nobody is _____________(缺席) , so let’s begin our meeting.