问题
填空题
液化石油气气体与空气比，密度大约为空气重（）倍。
答案
参考答案：1.5～2.1
搜题请搜索小程序“爱下问搜题”
液化石油气气体与空气比，密度大约为空气重（）倍。
参考答案：1.5～2.1
用方框中所给单词的适当形式填空，每词限用一次。
小题2:That man _______ me of my English teacher.They wear the same clothes. 小题3:When we were high up in the plane,we saw nothing but clouds ________. 小题4:What ______ everyone else brings a present? 小题5:His parents go out to work,he has to look after ________ at home. |