Winter is dangerous because it’s so difficult to know what is going to happen and accidents take place so easily. Fog can be waiting to meet you over the top of a hill. Ice might be hiding under the melting (融化) snow, waiting ahead to send you off the road. The car coming to you may suddenly slip（滑） across the road.
Rule No.1 for driving on icy roads is to drive smoothly (平穩(wěn)地). Sudden movements can make a car very difficult to control. So every time you either start or stop your car, increase or reduce your speed, you must be as gentle and slow as possible. Suppose you are driving with a full cup of hot coffee on the seat next to you. Drive so that you wouldn’t spill (濺) it.
Rule No.2 is to pay attention to what might happen. The more ice there is, the further down the road you have to look. Test how long it takes to gently stop your car. Remember that you may be driving more quickly than you think. Generally, allow twice of your usual stopping distance when the road is wet, three times this distance on snow than usual, and even more on ice. Try to stay in control of your car at all time and you will not get into trouble.
【小題1】The writer tries to _____ in this passage.

A．show his dislikes about bad winter weather
B．give information about winter weather
C．a(chǎn)sk people not to drive in winter
D．a(chǎn)dvise people about safe driving in winter
【小題2】According to the passage, the writer thinks that _______.
A．people should not drive in the snow
B．drivers should think more about problems in winter driving
C．people drive too fast in winter
D．winter drivers should stop their cars less
【小題3】In the passage the writer talks about a cup of coffee ______.
A．to show how important smooth movements are
B．to ask the drivers to bring some soft drinks with them
C．to tell the drivers to be more relaxed
D．to show how it can be spilled
【小題4】Which of the following is NOT true?
A．Traffic accidents take place easily in winter.
B．Fog and melting snow often cause car accidents.
C．The stopping distance on ice is as long as the usual one.
D．In winter you should drive your car with great care.


【小題1】D
【小題2】B
【小題3】A
【小題4】C

解析

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E

Most of us are used to seasons. Each year, spring follows winter, which follows autumn, which follows summer, which follows spring. And winter is colder than summer. But the earth goes through temperature cycles over much longer periods than those that we experience.

Between 65,000 and 35,000 years ago, the planet was much colder than it is now. During that time the temperature also changed a lot, with periods of warming and cooling. Ice melted during the warm periods, which made sea levels rise. Water froze again during the cold periods.

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The researchers used a computer model to look at the ways the ice could melt and how it might affect sea levels. They compared these results to evidence(跡象) of how temperatures and currents actually changed during that time.

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D. Ice melted and then froze again due to temperature.

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