Wei Hua_____ a busy day yesterday.[ ] A. 发布时间:2017-05-26 21:28 │ 来源:www.tikuol.com 题型:选择题 问题: Wei Hua _____ a busy day yesterday.[ ]A. has B. had C. was D. have
题型:选择题 请用化学用语填空:(1)n个铜原子________ (2)2个氢分子________ (3)3个硝酸根离子________ (4)氧化铁中铁显+3价________(5)地壳中含量最多的金属元素________ 查看答案