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第二节（共5小题；每小题2分，满分10分）
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Before going outside in the morning, many of us check a window thermometer(温度计)for the certain coldness in the refrigerator. We want it a certain hotness in the oven. If we don’t feel well, we use a thermometer to see if we have a fever. We keep our rooms a certain warmth in the winter and a certain coolness in the summer.
Not all the thermometers use the same system to measure temperature. We use a system called the Fahrenheit scale. But most other countries use the Centigrade scale. The most common kind of thermometer is made with mercury(水银)inside a clear glass tube. As mercury (or any other liquid ) becomes hot, it expands. As it gets colder, it contracts(收缩). That First. Take a clear glass juice bottle that has a cap; fill the bottle with coloured water. Tap a
hole in the center of the cap using a hammer and thick nail. Put the cap on the jar. Then stick a plastic straw(吸管) through the nail hole. Finally. Place a white card on the outside of the bottle and behind the straw. Now you can see the water lever easily. As the temperature goes down, the water will contract, and the lever in the straw will come
down. Perhaps you will want to keep a record of the water lever in the straw each morning for a week.
A. We use and depend on thermometers to measure the temperature of many other things B. Thermometers measure temperature, by using materials that change in the same way C. Now that you know this rule you can make a thermometer of your own that will work. D. The water will rise in the straw. As the temperature of the air goes up, the water will expand E. They label these in different ways. On the Fahrenheit scale water freezes at 32 degrees and F. Take wax (you may use an old candle if you have one) and melt some of it right where the in our daily lives. when they are heated or cooled. and rise even higher. boils at 212 degrees. On the Celsius scale water freezes at 0 degrees and boils at 100degrees.