免费注册 手机版 网站地图 小工具

学而优·知识库

首 页
Copper is often used as an electrical conductor because it _____.
A.has high resistance at low temperatures
B.has a highly polished surface
C.is able to pass current with little opposition
D.holds insulation together well
参考答案

关闭

前往注册

我已注册,登录账号 继续查看答案