充油电缆有哪几种接头?
参考答案:
充油电缆有直通接头、绝缘接头、塞止接头、过渡接头四种接头。
下列哪种元素与生物地球化学性疾病的发生无关()。
A.P
B.I
C.Se
D.As
E.F
_____ cold weather, the workers are still working at the working site.
A.In spite of
B.Instead of
C.Because of
D.As a result of