在立式除油罐中,油层厚度一般控制在(),油粒上浮的终点在油层的底面。
A.0.5~1.0m
B.1.0~2.0m
C.1.5~2.0m
D.2.0~3.0m
参考答案:C
属于闭合伤的是()
A.擦伤
B.火器伤
C.刺伤
D.直肠破裂
E.撕脱伤
I was about to tell him the secret __someone patted me on the shoulder.
A.as
B.until
C.while
D.when