电网标称电压为35kV的谐波电压的电压总谐波畸变率限值为()。
A.3%
B.2.4%
C.1.6%
D.1.2%
参考答案:A
-Is it OK to take this seat?
-Sorry. _______
A.here you are
B.take it
C.it’s taken
D.never mind
第一次华山论剑和第二次华山论剑相隔()年