乙炔是一种不饱和的()化合物。A、碳氧 B、碳氢 C、碳水 D、无机 发布时间:2017-10-15 14:51 │ 来源:www.tikuol.com 题型:单项选择题 问题: 乙炔是一种不饱和的()化合物。A、碳氧B、碳氢C、碳水D、无机
题型:单项选择题 Passage ThreeWhat did the speaker expect of life in a country town A.It would be dull and depressing.B.It would be comfortable and healthy.C.It would be strange and surprising.D.It would be spoilt by tourists with guide books. 查看答案