题目内容
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。注意:涂卡时,如答题卡上没有E、F、G选项,请按如下方式填涂:选E涂AB;选F涂BC;选G涂CD。
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. 1 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. 2
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. 3
First, take a clear glass juice bottle that has a cap; fill the bottle with colored 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.
4
Finally, place a white card on the outside of the bottle and behind the straw. Now you can see the water level easily.
5
As the temperature goes down, the water will contract, and the level in the straw will come down. Perhaps you will want to keep a record of the water level 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 100 degrees.
F. Take wax ( you may use an old candle if you have one ) and melt some of it right where the straw is stuck into the cap to seal them together.
G. People use thermometers which are made by themselves when travelling around the world.
A
E
C
F
D
【解析】
根据上文我们外出时,会使用温度计测量问题,说明我们使用并依赖温度计来测量温度。
上文提及了两种不同的计量方法,接下来就是分开来讲着两种方法。
根据下文的制作方法可知是自己制作温度计。
根据上下文的制作方法可知本部分是如何固定吸管。
根据下文可知水温上升,吸管里的水也会上升,是因为水会膨胀。
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。
In 1990 a report was published about what the earth might be like 20 years from then on. 71 According to the report,the picture of the earth in the year 2010 is not a pleasant one. 72 The population could be as large as 6300 million,almost 2150 million more than in 1985.More people would move into cities ,especially cities in developing countries.Cities like Cairo and Jakarta probably would each have 15 million by then.
73 Farmers will grow 90% more food than they did in 1985,but most of the increase would be in countries that already produce enough food for their people. 74 Poor farming ways are destroying large areas of crop land,changing farms into deserts.More farmland is lost as cities become larger and more houses are built.Air pollution will get worse as industrial countries burn more coal and oil.Many of the world's forests could disappear as more and more trees are cut down.Energy will continue to be a serious problem. 75 They only workde out the situation that exists today.By changing the situation,by settling the problems,the picture can be changed.There is still time for the nations of the world to work out a plan of action.But they warned that waiting too long to make de cisions would greatly reduce the chances of success.
A.Food production will increase,but not enough to feed all the people. |
B.The report was a result of a three - year study. |
C.Later on,more reports came out one by one. |
D.The world will be more crowded because the population will continue to grow. |
E.Experts believe enough food will be produced in developing countries very soon.
F.The experts say their picture of the earth for the year 2010 may be wrong.
G.Little increase is expected in South Asia,Africa and the Middle East.