下列不具有抗结核作用的抗生素是()。
A.链霉素
B.利福平
C.卡那霉素
D.克拉维酸
参考答案:D
30.He added, "President Obama is going to do_____ he thinks is necessary to get our economy moving again."
A.everything what
B.no matter what
C.whichever
D.whatever
游泳池水深1.8m,则游泳池底受到水的压强为 _________ Pa(g=10N/kg).