测定样品的凝点时,为消除水分的影响,一般用()作干燥剂干燥过夜。
参考答案:五氧化二磷
词汇运用(10分,每空一词)
小题1:No one is (允许)to drive after drinking.
小题2:As soon as I arrived in Hong Kong, I sent a (信息)to Mum.
小题3:About two hundred people _________( 死 )in Ya’an Earthquake on April 20th .
小题4:The moon light shines in (通过) the window and the room seems quiet and beautiful.
小题5:The teacher spent a long time (解释)the problem to the boys after class.
小题6:Now Father’s Day becomes very popular. It is on the (three) Sunday every June.
小题7:Teenagers should be encouraged to make decisions by (they).
小题8:It’s much (sun) this weekend. Why not go camping, David? ——Sounds great.
小题9:Everyone likes Mary in our class because she always talks to others (polite).
小题10:The telephone was one of the most important (invent) of the 19th century.
多元化能显著降低企业失败的风险。