Giving small children some money as a gift during the Spring Festival is a common ______ in China, w

题干

Giving small children some money as a gift during the Spring Festival is a common ______ in China, which may seem strange to foreigners?

A：sense

B：practice

C：ground

D：habit

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B

A．化学和环境	B.化学和安全
①防止水体污染——生活废水集中处理达标后再排放 ②减少二氧化碳排放——减少化石燃料的使用	①防止煤气中毒——在屋子中放一盆水 ②夜间发现石油气泄露——开灯检查
C.化学和生活、生产	D.物质性质和用途
①电器着火燃烧——用水浇灭 ②节约用水——农业上改漫灌为滴灌、喷灌	①氧气用作火箭的推进剂——氧气具有可燃性 ②干冰用于人工降雨——干冰能与水反应