题目

Do you have ________ Smith here? I’d like to have ________word with him． A．a; the      B．the; a      C．the; the   D．a; a 答案：D完全燃烧等质量的下列物质, 消耗氧气①最多的是_____, ②最少的是_____. [　　] A.H2　　B.C　　C.CO　　D.CH4