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 c

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 temperature. This helps us decide what to wear. 71 . We want our food to be a 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.
Both systems use the freezing and boiling points of water as their guide. 72 .
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 is why on hot days the mercury line is high in the glass tube. 73 .
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.
74 .
Finally. Place a white card on the outside of the bottle and behind the straw. Now you can see the water lever easily.
75 .
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 in our daily lives.B．Thermometers measure temperature, by using materials that change in the same way when they are heated or cooled.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 and rise even higher.E. They label these in different ways. On the Fahrenheit scale water freezes at 32 degrees and boils at 212 degrees. On the Celsius scale water freezes at 0 degrees and boils at 100degrees.
F. Take wax (you may use an old candle if you have one) and melt some of it right where the straw is struck into the cap to seal(把..粘住) them together.
G. People use thermometers which are made by themselves when travelling around the world.71-- 75 AECFD

(答案→)71-- 75 AECFD 解析：71. A 从前面上下文意义可知温度计在我们日常生活中的功能，便可知道选择A正确。72. E 从上文可知“温度计分华氏标准和摄氏标准两种方式计量温度，”选项E进一步介绍了这两种温度计量方式的具体标准。故正确答案是E。73. C 本段前一部分介绍了温度计的构造原理，下文根据此原理制造一个能够计量温度工作的温度计。所以选项C符合文意。74. F 根据上下文的逻辑意义，选项F是正确答案。75. D 从下文可知应选与之对应的选项D。

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