已知反应:X+2NaOH=Y+Na2CO3,下列说法不正确的是 A.Na2CO3 发布时间:2017-07-16 21:54 │ 来源:www.tikuol.com 题型:选择题 问题: 已知反应:X+2NaOH=Y+Na2CO3,下列说法不正确的是A.Na2CO3俗称纯碱B.若Y是H2O,则X不一定是一种盐C.该反应一定是复分解反应D.NaOH固体需密封保存
题型:选择题 根据对话情景,填入恰当的单词。A: Hi, Gina. Where are you going?B: I'm going to a gift(礼品)shop.A: Do you want to 1. __________ a gift?B. Yes, I do. Linda's birthday is coming. And I want to give her a surprise.A: Really? 2. __________ is her birthday?B: It's on November 20. Are you 3. __________ that day?A: Yes, I am.B: Great! Can you go to the 4. __________ with me?A: Sure, I'd love to. 查看答案
题型:选择题 下面关于运行记录管理叙述正确的是()A.变电运行记录由地市供电公司运行人员维护B.本班次发生的运行记录必须在交接班前录入C.巡视中发现的缺陷,应关联登记缺陷记录D.运行工区专责应定期检查录入记录合理性、准确性、及时性 查看答案