振打装置轴中心线水平误差不大于()㎜。
A.±0.5
B.±1.0
C.±1.5
D.±2.0
参考答案:C
A lot of vegetables _____ you to keep in good health. [ ]
A. make
B. want
C. try
D. help
大油罐内分段管组安装坡度一般为(),以便于排出冷凝水。
A.1/75
B.1/100---1/75
C.1/50---1/75
D.1/200---1/100