把3+3+3改写成乘法算式是[ ] A.3×3 B.2×3 C.3×2 发布时间:2017-04-23 05:23 │ 来源:www.tikuol.com 题型:选择题 问题: 把3+3+3改写成乘法算式是[ ]A.3×3B.2×3C.3×2
题型:选择题 My friend has _____ hair than me, and he's _____ than me. [ ]A. long, outgoing B. more longer, more outgoing C. longer, more outgoing D. longer, outgoing 查看答案
题型:选择题 已知1g氢气完全燃烧生成水蒸气时放出热量121kJ,且1mol O2的化学键完全断裂时吸收热量496kJ,水蒸气中1mol H-O键形成时放出热量463kJ,则氢气中1mol H-H键断裂时吸收热量为A.188kJB.436kJC.557kJD.920kJ 查看答案