问题 问答题 简答题

在拌制沥青混合料时,搅拌时间越长,混合料质量越好对吗?为什么?

答案

参考答案:不对。如果搅拌时间过长,高温集料上的沥青薄膜长时间曝露在空气中,便会给沥青带来有害的影响,而降低了混合料的耐久性,所以搅拌时间只要使混合料不产生花料为宜。

阅读理解

阅读短文,回答问题。

     Most people do not like to think about disasters (灾难), so they do not prepare for them. This is a

deadly mistake. Whether you can be alive or not is decided by preparation. Here are somc tips that could

savc your life.

     1. Getting through the first hour 

      Choose an out-of-town person that each family member can call after the disaster if you become

alone. Besides, choose two nearby places where family members know to meet. One should be close to

your home. The other should be outside your neighborhood. Keep your important papers at the bank or

another safe place.

     Leave a disaster-supply kit (一套装备) (see Part 5) near the front door. Make sure you keep it filled

with fresh food and water. 

      If you are advised to move to the safe place, leave the area right away.

     2. The disaster-ready home

     You may have some time to prepare before certain types of disasters. Take hurricanes (飓风) as an

example. 

      Bring in anything that could fly around or blow away.

      Prepare your car for leaving.

      Fill bottles with drinking water.

      Keep your radio on for weather information.

     3. The safest places 

      Hurricane: stay in an inside space with no windows. Glass could break and hurt you.

      Earthquake (地震): get under the nearest heavy desk or table. This will protect you from falling

things.

     4. Preparing for the worst- do this now!

     Hurricane: during the hurricane season, keep a two-week supply of drugs. Have wood and nails

(钉子) ready to cover windows.

     Earthquake: move beds away from windows, heavy pictures or mirrors. Place large and/or heavy

objects on lower shelves. Learn how to shut off the electricity and water.

     5. Your disaster-supply kit 

     First-aid (急救用的) kit and drugs; spare clothes; a radio; car keys; important phone numbers.

1. Should you leave when you are asked to move?

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2. What do you know is a deadly mistake from the passage?

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3. Why should you keep your radio on before certain types of disasters?

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4. Where can you stay to keep safe when hurricanes happen?

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5. What can you do to prepare for the earthquake according to the passage? (At least 3 points.)

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