向移动交换中心或基站供电的电力线,在进入建筑物时,宜采用地下电缆引入,电缆的户外端离建筑物的距离不宜小于()m。
A.30
B.40
C.50
D.60
参考答案:C
My parents don't mind what job I do ______ I am happy.[ ]
A. even though
B. as soon as
C. as long as
D. as though
液压剪扩两用钳的工作压力为36兆帕。