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问题 选择题

把盐酸溶液逐滴滴入到氢氧化钠溶液中直至过量，溶液pH的变化曲线为（　　）

A．

B．

C．

D．

答案

由分析可知：刚开始表现为氢氧化钠溶液的碱性，PH值大于7；把盐酸溶液逐滴滴入，与氢氧化钠溶液反应，中和至中性，PH值等于7；再滴入盐酸，盐酸过量，溶液呈酸性，则PH值小于7．

故选C．

完形填空

As we all know, games play a very important role in the growth of children. Children should grow along with playing games, for, __小题1:  playing games, they can not only acquire knowledge, but also cultivate their abilities to get along with others.

However, most children _ 小题2:  (face) with a completely different situation. Most parents fear that games will prevent children from increasing new knowledge and   __小题3:__ the children will fail in the future examinations. So, instead of __小题4:__ ( let ) the children   小题5:  find and learn naturally from their surroundings, they force their children to take part in various kinds of classes, learning English, playing   小题6:__           piano or practicing drawing, etc. What’s more, some parents put   小题7:  the children’s toys which are very useful in developing children’s imagination and practical abilities.

 小题8:  is a piece of good advice to those parents:   小题9:  you want to expect your child to be able to accomplish something, you must first of all develop his ability to adapt to the new surroundings. That cram education can lead to nothing  _ 小题10:  a failure in the children’s growth.
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填空题

“妆成有却无”，被认为化妆的最高境界，它强调的是化妆的（）原则。
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