巴拿马位于(),是世界上第一个美国以外使用美元作为法定货币的国家。
A、欧洲
B、亚洲
C、美洲
D、大洋洲
参考答案:C
—When did you buy the computer?
—I have ______ this computer for 5 years, but it still works well.[ ]
A. bought
B. have
C. had
可与含钙类药物同时服用的药物是
A.环丙沙星
B.诺氟沙星
C.四环素
D.磺胺甲噁唑
E.氧氟沙星