单项选择题
A、2.5B、5C、10
电容器用熔断器保护时，单台电容器可按电容器额定电流的（）倍选用熔体的额定电流。A、1.5～2.5B、1.3～1...
单项选择题电容器用熔断器保护时，单台电容器可按电容器额定电流的（）倍选用熔体的额定电流。
A、1.5～2.5B、1.3～1.8C、2.5
（）是真空断路器的绝缘和灭弧元件。A、辅助开关B、真空灭弧室C、波纹管D、操动机构
单项选择题（）是真空断路器的绝缘和灭弧元件。
A、辅助开关B、真空灭弧室C、波纹管D、操动机构
Their government said that they had to use force to mai...
单项选择题Their government said that they had to use force to maintain social stability，but many people（）that it wouldn’t（）stability and harmony.
A.contradicted them by saying；makeB.countered by saying；make forC.opposed by saying；make upD.have been lagged behind；slip off
