A.30%-80% B.40%-60% C.40%-85% D.20%-70%
A.22KV B.28KV C.38KV D.50KV
A.20℃時(shí)為1 B.20℃時(shí)為2 C.20℃時(shí)為3.5 D.20℃時(shí)為4