养基的pH过高可扩大下列哪种药物的抑菌圈()。
A.四环素
B.阿米卡星
C.红霉素
D.左氧氟沙星
E.青霉素
参考答案:C
It to you whether I like it or not, because you never listen to me. [ ]
A. makes a difference
B. makes no difference
C. makes some difference
D. makes any difference
我国工人阶级诞生于()。
A.1840年以后
B.1861年以后
C.1911年以后