2. 职称英语
  3. According to the World Wildlife Fund, the polar bear could be faced with ext

According to the World Wildlife Fund, the polar bear could be faced with ext

游客2023-10-20  71
问题     According to the World Wildlife Fund, the polar bear could be faced with extinction and a large number of other animals reduced to very small remnant populations by global warming in Arctic regions.

    Warmer winters are【C1】r______ for the thinning or disappearance of ice sheets in many parts of the Arctic,【C2】______ (result)in a situation where polar bears are at risk of【C3】______(starve)because they cannot travel to their normal breeding and hunting grounds.
    Even in places【C4】______there is still a lot of ice around, polar bears are under threat because they rely on snow caves to rear their young.【C5】______of the warmer weather, some of these caves now collapse suddenly and bury the bear cubs inside.
    Other effects of【C6】c______ change are also being observed. Animals such as reindeer (known as ’ caribou’ in North America)have adapted【C7】______ the extreme cold and are therefore able to cope with the Arctic climate. For【C8】m______of years they have been migrating to places where they breed and find food. These【C9】______(migrate)coincide with the growing seasons of the plants they feed on.【C10】______(ecology)have found, however, that these animals are now arriving at their spring feeding grounds too late, and the【C11】______they eat have gone to seed. This is having a【C12】s______ impact on caribou herds. A substantial number of calves are being lost and there is already a substantial【C13】(reduce)______ in the size of the herds. Scientists are concerned, but【C14】______(power)to do anything in response to the situation—everything they have tried has been in vain. This is simply another unforeseen consequence of【C15】______(globe)warming. [br] 【C8】
选项
答案 millions
解析 (根据上下文可知此处指“几百万年以来驯鹿一直在向其繁殖和觅食的地方迁徙”。millions of指“几百万…”，注意表示泛指时，hundred、thousand、million、billion和trillion这样的词要用复数形式。)
转载请注明原文地址:https://tihaiku.com/zcyy/3113660.html
相关试题推荐
随机试题
最新回复(0)