题目

        that she didn’t do a good job, I don’t think I am abler than her. A. To have said          B. Having said          C. To say                 D. Saying   答案：B7、下列微生物不属于细菌的是（   ）     A．乳酸菌                 B．酵母菌                C．甲烷菌                D．根瘤菌