下列各组物质中,前者属于纯净物,后者属于混合物的是( )
A.二氧化碳,澄清石灰水
B.冰水混合物,五氧化二磷
C.矿泉水,河水
D.净化后的空气,受污染的空气
答案:A
—Excuse me? ______
—It is over there, near the bus stop. [ ]
A. How do you like the cinema?
B. May I ask you the way?
C. Where is the Bank of China?
D. How far is the market from here?
旅游区(点)的质量等级的评定应严格按照“自检、______、初评、______、审批、______”的程序进行。