题目

－How is everything going in Suzhou?一The haze(雾霾)is very serious these days. So we should learn toourselves from the danger.A. provide B. protect C. practice D. please 答案：【答案】B【解析】句意：——苏州一切还好吗？——这些日子雾霾非常严重。所以我们应该学会保护自己免受危险。provide提供，protect保护，practice练习；please使高兴；protect sb from sth保护某人免受…….；故选B。下列哪项的组成中含有糖类物质 [　　] A．RNAB．乙醇 C．胰岛素D．生长激素