Some people haven’t realized something as common as _______to the sun for a long time will do harm to their skin and even cause skin cancer.

A．exposing

B．being exposed

C．having exposed

D．exposed

开具处方时，药品用法不得使用“遵医嘱”、“自用”等含糊不清字句，可用规范的下列哪种文字书写。（）

A.英文

B.拉丁文

C.中文

D.以上都可以