With a lot of problems , the VS troops are having a hard time in Iraq. A. settled B. being settled C. settling D. to settle 答案:D结合下列图表进行分析,有关说法正确的是( )抗菌药物抗菌机理环丙沙星抑制细菌DNA解旋红霉素能与核糖体结合利福平抑制DNA聚合酶活性A.环丙沙星和红霉素分别抑制的是细菌的①和③B.环丙沙星和利福平抑菌原理不同,但抑制的都是①C.结核杆菌的④和⑤都发生在细胞质中D.①~⑤都可发生在细胞中