问题
单项选择题
开式循环冷却水系统在运行过程中，应密切监督循环水的（）。
A.碱度；
B.电导率；
C.硬度；
D.浓缩倍率是否超标。
答案
参考答案：D
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开式循环冷却水系统在运行过程中，应密切监督循环水的（）。
A.碱度；
B.电导率；
C.硬度；
D.浓缩倍率是否超标。
参考答案：D
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| Do you like tea? Tea 1 becoming the most popular drink all over the world. In China, when you visit someone, the host will bring you a cup of good tea to show welcome. Americans love coffee and they like 2 , too. Not only Chinese, but also many people around the world like tea. The 3 people to drink tea were Chinese. And people in Europe first learned to grow and drink tea 4 a book in Italy in 1599.Fifty years later, the first ship of tea from China 5 Holland(荷兰). 1. 2. 3. 4. 5. |