(电力)线路
参考答案:
用于电力系统两点之间输电的导线、绝缘材料和各种附件组成的设施。
a、b的和是180,a是45,b是a的______倍,a是b的______.
Do you know who to take part in the competition?
A.chooses
B.has chosen
C.chose
D.was chosen