铸造合金的固态收缩大,则铸件易产生() A.冷隔 B.缩孔、缩松 C.浇不足 发布时间:2017-09-16 17:37 │ 来源:www.tikuol.com 题型:单项选择题 问题: 铸造合金的固态收缩大,则铸件易产生()A.冷隔 B.缩孔、缩松 C.浇不足 D.应力、变形
题型:单项选择题 —Do you always spend lots of time playing computer games? —No, but I spend much time my homework. [ ]A. on; in B. on; on C. in; on D. in; in 查看答案