答案:B
A. 7.0,0.3
B. 7.0,0.2
C. 5.0,0.3
D. 5.0,0.2
A. 6m
B. 8m
C. 9m
D. 11m
A. ±1%或±50mm
B. ±2%或±50mm
C. ±3%或±50mm
D. ±3%或±100mm