答案:电流
A. (A)135mA
B. (B)140mA
C. (C)145mA
D. (D)150mA
A. (A)800m
B. (B)900m
C. (C)1000m
D. (D)1100m
A. (A)1000mm
B. (B)2000mm
C. (C)3000mm
D. (D)4000mm
A. (A)增大
B. (B)减少
C. (C)不变
D. (D)可能增加也可能减少