• <tr id="yyy80"></tr>
  • <sup id="yyy80"></sup>
  • <tfoot id="yyy80"><noscript id="yyy80"></noscript></tfoot>
  • 99热精品在线国产_美女午夜性视频免费_国产精品国产高清国产av_av欧美777_自拍偷自拍亚洲精品老妇_亚洲熟女精品中文字幕_www日本黄色视频网_国产精品野战在线观看 ?

    跟蹤導(dǎo)練(一)1

    2015-03-16 18:01
    時代英語·高二 2015年1期
    關(guān)鍵詞:設(shè)想

    閱讀地帶

    A

    There are about 1,200 species of bats in the world, Swartz says. Some eat fruit. Others eat insects or honey. And just a few drink blood.

    Some bats use their eyes to see where things are. Others collect information about their surroundings by bouncing sound off objects and listening to the echoes (回聲).

    But what all bats have in common (other than being the only flying mammals in existence) are flexible (靈活的) wings that enable them to change directions quickly. If youve ever seen bats flying with a rush through the air in the early evening, you probably noticed how suddenly they could change directions.

    Scientists have long assumed (設(shè)想) that bats fly the same way as birds and insects do—with firm, airplane-like wings that connect to the shoulder. The problem with that assumption, however, is that bats arent birds or insects. As mammals, they have more in common with people, horses and dogs than with other flying creatures.

    For example, birds have bones which are empty inside, and insects have no bones at all. But most mammals have solid and heavy bones, which would make flying tough.

    To solve this problem, bats have evolved strong and heavy bones near their shoulders, where they need more support. Theyve also saved some weight by developing lighter and weaker bones near the tips of their wings. The result is light but strong and very flexible wings.

    1. What can we know about all bats from the passage?

    A. They can hear sounds with their ears.

    B. They are the same as birds in every direction.

    C. They have nothing in common with people.

    D. They can fly well because of their flexible wings.

    2. What can be inferred from the passage?

    A. Some bats may be dangerous to people.

    B. The scientists assumption is proved to be right.

    C. Environment helps bats develop the ability of flying.

    D. Bats collect information only by listening to echoes.

    3. What can be the best title of the passage?

    A. Bats B. Bats Food

    C. How Bats Fly D. Flexible Wings

    B

    In Western Europe homelessness has quietly been climbing to levels not seen since the end of World War II. According to the European Federation of National Organizations Working with the Homeless (FEANTSA), at least 3 million Western Europeans are homeless this winter—and between one-fifth and one-third of them are members of homeless families. Think homelessness is an American problem? Think again. As a percentage of population, its as bad in Europe as it is in the US, where there are an estimation (估計) of 2 million homeless people.

    猜你喜歡
    設(shè)想
    愿望
    光影流年
    在你的名字里住著
    我設(shè)想
    “中國現(xiàn)代風(fēng)云人物雕塑群像”設(shè)想
    編后的話
    青海省| 盘山县| 沂水县| 济南市| 衡东县| 鲜城| 黄浦区| 沙洋县| 玛纳斯县| 交口县| 黑河市| 文安县| 绥中县| 赣榆县| 竹山县| 措美县| 含山县| 浙江省| 诸暨市| 卢湾区| 静宁县| 积石山| 报价| 临夏市| 三台县| 新蔡县| 增城市| 德庆县| 泸溪县| 高州市| 姚安县| 邵东县| 越西县| 高唐县| 兖州市| 连州市| 中牟县| 福清市| 蒙自县| 九江市| 庄浪县|