假定在SiO2中加入训(Na2O)=10%的Na2O，请计算氧与硅之比值。如果ω(O 发布时间：2017-02-19 10:16 │ 来源：www.tikuol.com 题型：问答题 问题： 假定在SiO2中加入训(Na2O)=10%的Na2O，请计算氧与硅之比值。如果ω(O):ω(Si)≤2.5是玻璃化趋势的判据，则形成玻璃化的Na2O最大量是多少
题型：问答题 从方框中选出最佳答案完成对话。Friend: Let's go to a baseball match tomorrow. 1 You: No, I won't.Friend: 2 You: Because it sounds boring. You told me that the game would last five days. Friend: No, this is a one-day game.You: One day is still too long. Friend: 3 You: It's fine now, but it may not be fine tomorrow. What are the seats like? Friend: 4 You: Nice! I remember what you said about them-hard wooden benches! Friend: 5 You: Sleep! I don't want to spend six hours sleeping on a hard wooden bench. A. The weather will be fine. B. They are very nice. Really?C. Why not?D. It'll be very interesting. E. You may always sleep on it.1._____ 2._____ 3._____ 4._____ 5._____ 查看答案
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