A.5~9 B.2.3~3.4 C.1.8~2.2 D.3~3.36
A.恒流 B.恒压 C.恒温 D.恒动
A)800±20 B)1000±20 C)900±20 D)1100±20
A.4~10% B.25~40% C.>40% D.40~90%
A.缓慢 B.加快 C.抖动 D.不变