答案:B
答案:B
A. (A)0.3
B. (B)0.5
C. (C)0.7
解析:解析: J397
A. (A)半波整流
B. (B)全波整流
C. (C)桥式整流
A. (A)自感系数
B. (B)磁通
C. (C)电流
A. (A)等于
B. (B)接近
C. (C)超过
A. (A)绿色许可证
B. (B)路票
C. (C)出站调车通知书
A. (A)牵引
B. (B)制动
C. (C)最小
A. A.5
B. B.8
C. C.10
A. (A)进行
B. (B)注意
C. (C)停车