【判断题】
再生系统中只对碱液加热，是因为温度对阴树脂再生度的影响大于对阳树脂再生度的影响
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按交换容量定义可知全交换容量＞工作交换容量＞平衡交换容量
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树脂的交联度越大，树脂与离子越容易发生交换反应，反应速度越快
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小正洗的目的是洗掉压脂层中积存的再生废液和再生产物
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当再生剂容量一定时，随着再生剂浓度的提高，树脂的再生程度也相应提高
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测定PO43-时，为加快水样的显色速度，避免硅酸盐的干扰，水样的酸度应维持在0.6mol/L
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在工作场所可以存储汽油、酒精等易燃物品
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当浓酸倾洒在室内时，应先用碱中和再用水冲洗
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离子交换树脂在水中的酸碱性决定于树脂的离解能力
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凝结水精处理再生用电热水箱进水是从顶部进入的
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交换器出入口门使用气闭门是为了使它们关得更严
【判断题】
逆流再生工艺主要特点是树脂层的交换能力得以充分利用，故可提高再生剂利用率，并节约再生用酸、碱、盐的耗量
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阳交换器反洗时，控制反洗流量的原则是节约用水
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再生剂比耗增加，可提高交换剂的再生程度，故比耗越高越好
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混合指示剂具有用量少、颜色变化明显的特点，但其变色范围太宽
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逆流再生固定床的压实层作用是为了防止反洗时树脂乱层
【判断题】
EDTA与金属离子的络合比一般是1：1
【判断题】
强碱性阴离子交换树脂不能用NH3.H2O作再生剂
【判断题】
一般强酸性阳离子交换树脂由Ｎａ型变成Ｈ型、强碱性阴离子交换树脂由Cl型变成OＨ型，其体积均增加５％
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树脂的除硅工作交换容量越大，则出水残留HSiO3-含量越低
【判断题】
在中性溶液中阴树脂不能与酸根离子进行交换
【判断题】
在凝结水除盐系统中，阳树脂的氨化必须在阴阳树脂混合前进行
【判断题】
电厂水处理用的阴阳离子交换树脂是由苯乙烯和二乙烯苯聚合而成的高分子化合物
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在相同直径下，逆流再生床比顺流再生床消耗再生剂要多
【判断题】
一级除盐系统中，除碳器设置在阳床之前最合理
【判断题】
离子交换树脂是一种不溶于水的高分子化合物
【判断题】
离子交换器内的交换剂层愈厚，交换器运行过程中的水头损失愈大，周期制水量愈少
【判断题】
逆流再生式阳床每次再生前都需要进行大反洗
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( ) 26. Where does the writer of "The little Prince" come from?
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( ) 27. What does the prince do after the fox tells him a secret?
A．He cares more about a flower and a sheep．
B．He meets many more strange adults on other planets．
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D．He discovers interesting things such as a snake, other roses and a fox
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( ) 28. What does "The little Prince" mainly talk about? It' s about _________．
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( ) 29. What is the writer's main purpose（目的）in writing this passage？
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( ) 30. Why did the father not ask his son not to do this and do that？
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( ) 31. What would someone learn from this passage？
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( ) 32. What may be the proper Chinese for the underlined part in the passage？
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( ) 33. Why did Natalie Smith pay for the six cars behind her?
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( ) 34. Judy Foreman copied down the phrase because she ___ .
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( ) 35. Who came up with the phrase according to the passage?
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( ) 36. What can we infer from the last paragraph?
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B. People who receive kindness are likely to offer it to others.
C. People should practice random kindness to strangers they meet.
D. People who receive kindness are likely to pay it back to the giver.
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( ) 37.The greatest river for navigation is ___________.
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( ) 38. From a dam, people can use the water for ___________.
A. keeping the rivers clean B. only making electricity
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( ) 39. The water in the river is polluted because of _____________.
A. people's drinking water too much B. people's swimming in the river too much
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( ) 40. The best title of the passage is ___________.
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