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  • 题型:阅读选择 题类:常考题 难易度:普通

    试题来源:仁爱科普版八年级上Unit4 Our world topic 2How can we protect ourselves from the earthquake 同步练习

    根据短文内容,选择正确答案。

    Hurricanes(飓风) are storms. They can cause terrible waves, wind and rain. They happen in the Atlantic Ocean and the Pacific Ocean most of the time.

    Category(类别)

    ·Scientists divide(划分) them into five categories according to the wind speed.

    ·A Category 5 hurricane can destroy(摧毁) all the buildings.

    Characteristic(特征)

    ·Hurricane Season usually comes on June 1st and ends on November 30th in the Atlantic Ocean, from May 15th to November 30th in the Pacific Ocean.

    Danger

    ·It can cause flood when a hurricane comes with heavy rain.

    ·A hurricane has an eye. The eye means the center of a hurricane. After the eye passes, the wind and rain comes again.

    Safety advice

    ·Stay inside during the Hurricane, or you'll be injured.

    (1)Hurricane Season usually lasts about _______ months in the Atlantic Ocean.

    A . 4 B . 5 C . 6 D . 7
    【答案】
    (2)Hurricanes are divided into five categories by _______.

    A . wind speed B . the degree of damage(破坏程度) C . the places of hurricanes D . The time of hurricanes happening
    【答案】
    (3)The _______ of a hurricane is called the eye.

    A . speed B . center C . damage D . Height
    【答案】
    (4)When a hurricane comes with heavy rains, _______ will happen.

    A . a tsunami (海啸) B . a strong wind C . an earthquake D . A flood
    【答案】
    (5)When a hurricane happens, we had better _______.

    A . call the police B . Walk outside C . Stay inside D . Run after it
    【答案】
    【考点】
    【解析】
      

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  • 举一反三
    根据短文内容,选择最佳答案。

        Some days, don't you think, "Wouldn't it be nice if the laundry would just do itself?” Self-cleaning clothes may sound crazy. But Australian researchers have found a way to make something like this possible!

        A team at RMIT University in Melbourne, Australia, found a way to put special nanostructures (纳米结构) into clothing, which can then clean the clothes. When sunlight hits the nanostructures, they break down the dirt and stains (污渍) that don't belong on your clothes.

        The nanostructures don't break down the actual clothing because cotton and the other clothing materials are too strong to be broken down. According to CNN, the researchers cover the clothing in a solution made of silver and copper (铜) nanostructures. All it takes is 40 minutes of sunlight and your clothes will look as good as new.

        So if you spill on yourself during lunch, you can step outside for a walk, and it will be clean by the time you go inside. It not only makes your life easier, but it can also be good for the environment.

        According to the US Department of Energy, the average load of laundry uses about 25 gallons (about 94 liters) of water. Water is a very important resource, so using less of it to wash clothes is better for the environment. But one of the scientists at RMIT University knows more needs to be done.

        “There's more work to do before we can start throwing out our washing machines,” said Dr Rajesh Ramanathan, “but this is a strong foundation (基础).”

        So what's the next step? Ramanathan wants to either start selling the solution by itself or convincing (说服) clothing makers to treat the clothing with the solution while clothes are being made.

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