Jimmy managed to make a(n)        profit out of the deal，for he had got such a good opportunity．

A．handsome

B．pretty

C．attractive

D．beautiful

采用悬滴法检查不染色标本时在显微镜下若看见细菌在液体中能定向地从一处泳到另一处，这称为()

A．分子运动

B．布朗运动

C．分子运动与布朗运动

D．真正运动

E．分子运动或布朗运动