us要加the嗎，in

需要加the，例如：

1、In the US， distance is measured in miles.在美國，測量距離以英里作單位。

2、The new drug has not yet been licensed in the US.這種新藥尚未在美國獲得許可。

3、He's a major in the US army.他是美國陸軍少校。

4、What's the highest mountain in the US?美國哪座山最高