用一个恒定电动势E和一个内阻R0=0时我们称之为()。
A、电位源
B、理想电流源
C、理想电压源
D、电阻源
参考答案:C
We have very strict quality control and anything imperfect is ____, so customers feel secure about our products.
A.denied
B.rejected
C.deserted
D.refused
什么是锦纶?