远洋船舶驶抵外国港口时,本国国旗应挂在()
A.前桅桅杆上
B.首旗杆上
C.尾旗杆或后桅斜杆上
参考答案:C
hard you try, it is difficult to lose weight without cutting down the amount you eat.
A.However
B.Whatever
C.Whichever
D.Whenever
药物与适宜成膜材料经加工制成的膜状制剂()
A.气雾剂
B.喷雾剂
C.吸入剂
D.膜剂
E.涂膜剂