下列物质的名称、俗称、化学式相符的是( ) A.碳酸氢钠苏打NaHCO3 B.氢 发布时间:2017-05-17 16:23 │ 来源:www.tikuol.com 题型:选择题 问题: 下列物质的名称、俗称、化学式相符的是( )A.碳酸氢钠 苏打 NaHCO3B.氢氧化钠 烧碱 NaOHC.水银 汞 AgD.氯化钠 食盐 NaCl2
题型:选择题 This, I think, ___ the first time that we ___ traveling together. Would you like to join us?A. has been; has goneB. was; had goneC. will be; are goingD. would have been; would go 查看答案