1kg的石油燃烧后可以产生()的热量。A.1万×104kcal B.2×104kca 发布时间:2019-08-16 03:35 │ 来源:www.tikuol.com 题型:单项选择题 问题: 1kg的石油燃烧后可以产生()的热量。A.1万×104kcalB.2×104kcalC.3×104kcalD.4×104kcal
题型:单项选择题 The students entered the classroom, smiling and________, and________down to have their lessons. [ ]A. talked; sat B. talking; sittingC. talking; sat D. talked; sitting 查看答案