2. 外语
  3. The greenhouse effect causes trouble by raising the temperature of the planet. The【C1】______rise is not very much, but the Earth

The greenhouse effect causes trouble by raising the temperature of the planet. The【C1】______rise is not very much, but the Earth

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问题     The greenhouse effect causes trouble by raising the temperature of the planet. The【C1】______rise is not very much, but the Earth’s ecosystem is very weak, and small changes can have large effects.
    It has been believed that this【C2】______of one degree will happen by the year 2025. This could probably【C3】______the North American corn belt, which produces much of the world’s grain,【C4】______to much higher food prices, and even less food for the Third World than they already have. However, it would also mean that some countries which are further north would be able to【C5】______crops they had never been able to before, although there is less land as you move north from the corn belt.
    The other serious worry is that rising sea levels from the melting of the polar ice could【C6】______flood many countries. A rise in sea levels of one meter, which many experts are【C7】______by the year 2100 (and some as soon as 2030), would flood 15 percent of Egypt, and 12 percent of Bangladesh. The Maldives in the Indian Ocean would almost【C8】______disappear. Most of the countries which would suffer most from a rise in sea levels are the poor【C9】______states, so the islands in the Caribbean, South Pacific, Mediterranean and Indian Ocean have formed the Alliance of Small Island States, AOSIS, so they have a【C10】______voice in international politics and can make the richer developed world listen to their problems.
    A. severely B. damage C. island D. critical
    E. grow F. mainland G. louder H. predicting
    I. rise J. completely K. geometry L. actual
    M. extending N. leading O. develop
【C2】
选项
答案I
解析 此处应为名词。空白处前的this一词表明空白处说的内容在上一段提到过，而从后面的degree一词可以推断空白处说的与温度有关，对比上一段，只有rise合适。
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