安装剩余电流动作保护器前,应采用()V的兆欧表对低压电网进行绝缘电阻测试。
A.250
B.500
C.1000
D.2500
参考答案:B
— "Tom spends too much and I am going to rid him _____ his pocket money." the father said angrily.
— "No, No, you can't but you can _____ the amount." [ ]
A. from; cut down
B. of; reduce
C. with; lessen
D. for; decrease
8岁小儿,晨空腹注射乙脑疫苗,注射中出现头晕、心慌、面色苍白、出冷汗,心跳加快,应考虑
A.过敏反应
B.全身反应
C.晕针
D.局部反应
E.局部强反应