下列的实验说明了什么：
（1）图A实验说明______的存在；
（2）图B演示纸条被抽走了，杯子却留在原处，说明杯子具有______；
（3）图C是探究水的沸腾实验，水在沸腾过程中______保持不变．
A、水不从杯中流出，正是由于大气压强的存在；
B、纸条被抽走了，杯子由于惯性会留在原处；
C、水在沸腾过程中，不断吸热，温度保持沸点不变．
故答案为：（1）大气压强；（2）惯性；（3）温度．
完形填空（10分）阅读下列短文，选择可以填入空白处的最佳选项。 Water, it’s a problem for the whole world. A bottle (瓶) of water may not seem like much to us, 1 it can help the people who live in drought-hit (遭受旱灾的) areas in China. In the past few months, many places in southwest China have 2 a serious drought. There has been very little 3 since last autumn. More than 20 million people are 4 trouble finding safe drinking water. After learning about the drought, many people around the country helped by 5 away water, money and other resources (资源) to the people there. Last week, the Young Pioneers and the Communist Youth League in China called on (号召) each student to give one bottle of water to the drought-hit area. In Xi’an, 900 students bought over 1000 bottles of water 6 their pocket money. They also wrote their 7 on the bottles. “I hope you get more rain there. I hope you are happy.” A bottle of water isn’t much, but thousands of bottles will be very 8 . The serious drought has also made students 9 the importance of saving water. One student said, “I have decided to take a shower twice a week 10 every day to save water.”
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