以下不属于喹诺酮类药物的是()。
A、环丙沙星
B、达氟沙星
C、氟甲喹
D、链霉素
参考答案:D
You can never be ________ when crossing the street.
A.very careful
B.too careful
C.carefully enough
D.enough careful
甲板水管系的用途是()
①冲洗厕所及排污水;
②消防用水;
③冲洗甲板和锚链;
④供舱室卫生用水。
A.①②
B.②③
C.③④
D.①④