当天然水中的碱度＞硬度时，水中既有（）盐硬度，又有（）盐碱度，而无（）盐硬度。
参考答案：碳酸；钠；非碳酸
阅读理解。
根据上面的广告内容，回答下列问题。
1. What number should Jim call if he wants to learn software?
2. Where can you have Business English courses?
3. What is a website's name on one of the ads?
4. How much do two persons pay for a 2-night stay in the Belvedere Hotel on Dec. 31 and Jan.1?
5. Mr Black will take his 6-year-old twin sons to see the film The Jungle Book. How much will they
pay for the tickets?
标志着十 年内战基本结束，促进了国共合作抗日局面出现的事件是 [ ]
A．中国人民的局部抗战开始
B．张 * * 、杨虎城对蒋介石“兵谏”
C．西安事变和平解决
D．工农红军改编为八路军、新四军
