题目

为了防止患甲状腺肿大病，市售的食盐中常添加一定量的 A．葡萄糖         B．碘酸钾        C．碳酸钠        D．氯化钾 答案：B----Would you permit me ______ here?---- Sorry. We don’t permit ______ here in the reading room.A. smoking, smoking       B to smoke, to smokeC. smoking, to smoke       D. to smoke; smoking