旋风分离器是靠()的作用来分离粉尘的。
A、重力
B、离心力
C、浮力
D、表面张力
参考答案:B
There is no greater love than ________ who devotes his whole life ________ mankind.
A.that of a man; to benefiting
B.a man; to benefiting
C.that of a man’s; benefits
D.a man’s love; in benefiting
病人目胞色黑而晦暗者,属()
A.湿热内蕴
B.血虚失血
C.肝胆失疏
D.血虚
E.肾虚