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问题 填空题

根据汉语和首字母填空提示，写出单词，完成句子。

1. Shanghai is a big city on the east c______ of China.

2. The hill is l ______, but the mountain is very high.

3. Those students will go to that ______ (村庄) at the weekend.

4. Ji'nan is the ______  (省会) of Shandmg Province (省).

5. —Where is the West L              ? 

    —It's in Hangzhou.

答案

l. coast  2. low   3. village    4. capital   5. Lake

完形填空

Once there was a lovely vegetable field with a very big tree in it. Both the vegetables and the t________小题1: made the garden look wonderful.

No one knew that the vegetables in the field and the tree couldn't get on well with each other. The vegetables h________小题2:the tree. They thought the tree did not leave them e________ 小题3:light to survive. On the other hand, the tree hated the vegetables. He complained that the vegetables drank nearly all the water b________小题4: it could get to him.

The situation became worse and worse. One day, the vegetables got angry and decided to use up all the w________小题5:in the ground so that the tree would dry up. The tree fought back by refusing to give the vegetables shade(树荫) from the hot sun. Soon they both began to dry up.

Neither of them thought that the gardener would stop watering his vegetable f________小题6: when he saw it becoming worse. When the gardener did that, the tree and the vegetables really felt how t________小题7: they were. There seemed to be no ways to solve the problem, but one of the vegetables, a small pumpkin

r________小题8:what was going on, and decided to deal with it. Though there was little water and it was too hot, the little pumpkin did all he could to grow... F________小题9: he grow very big, the gardener noticed that and started watering the field again because he wanted to win the beautiful big pumpkin competition. At the same time, the tree and the vegetables grew better. They realizes that it was better to help each other than to f________小题10:.

From then on, they worked together and lived in harmony with these around them.
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问答题

做化学实验时，实验台上的药品应分类有序地摆放．在一次化学兴趣小组活动中，实验台上摆放了下列药品，（1）盐酸，（2）硫酸，（3）氢氧化钾，（4）氢氧化钙，（5）硝酸银，（6）______（7）镁带（8）铜，其中横线空白处的试剂瓶的标签破损（如图所示）

（1）（1分）欲比较铜和银的金属活动性强弱，可选用上述药品中的______进行实验（选填序号）；

（2）（2分）上述有些药品若敞口放置很容易变质．试举一例，说明变质的原因______（用方程式来表示）；

（3）（7分）同学们欲探究标签破损的药品的成分．

【分析思考】根据药品分类摆放的原则，该药品可能是______；

A．酸       B．碱      C．盐       D．单质

【作出猜想】A可能是Na2CO3溶液 B还可能是______溶液

【设计并实验】

（Ⅰ）小明想测定该溶液的酸碱度，不能使用下列物质中的______

A．石蕊溶液           B．PH试纸           C．酚酞溶液

（Ⅱ）小明测得该溶液的PH值大于7．小强选用所摆放的试剂，在小明的实验基础上通过进一步的实验确定它是Na2CO3溶液．请你补全小强的实验报告．

选用试剂（填入序号）实验现象结论
产生大量气泡原试剂是Na2CO3溶液．
[反思与评价]小伟对小强的结论提出质疑，认为该试剂还可能是______溶液．

因为______．根据你学习过的某种灭火器原理的有关知识，你认为可以用______的方法加以鉴别．
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