题目

气体打火机使用一种有机化合物为燃料,这种燃料稍加压时易液化,减压时易气化,点燃能燃烧,它可能是 A.乙醇(沸点78.5℃)              B.丙烷(沸点-42.6℃) C.丁烷(沸点-0.5℃)              D.乙酸(沸点117.9℃) 答案:C   解析:丁烷的沸点-0.5℃,易液化和气化。 I can’t go with you because I have _____ homework to do. A. too many   B. too much       C. much too     D. many too
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