电力电缆在进入基站机房后,按照实际需求在交流配电箱输入端加装()。
A、熔丝
B、漏电保护器
C、热继电器
D、电涌保护器
参考答案:D
—Do you know the girl ______ is playing the guitar?
—Yes, she is Jack's sister. [ ]
A. whom
B. which
C. who
D. what
油品的燃点随油品的变重而()
A、降低
B、升高
C、不变