重介质分选工考试单项选择题每日一练(2018.11.18)

A.特低灰煤
B.低灰煤
C.中灰煤
D.高灰煤

A.随机误差
B.过失误差
C.系统误差
D.系统误差及过失误差

A.±1%
B.±2%
C.±3%
D.±4%

A.0.60%1.00%
B.0.50%0.80%
C.0.40%0.60%
D.0.30%0.40%

A.1/2
B.1
C.1.5
D.2