A.4 B.5 C.8 D.10
A.37.3 B.38.7 C.结果作废 D.以上都不是
A.0.1s B.0.5s C.1s D.以上都不是
A.1900,1800 B.1800,1800 C.1900,1900 D.1850,1850
A.7.6% B.8.2% C.8.3% D.无效