3.B 事实细节题。文章第四段最后一句They said plants had been the key object of study because their reaction to climate change could have an effect on food chains...由此可知本题选择B项。
4.D 推理判断题。根据文章最后一段...beyond 2℃ this century-a point scientists say will bring the danger of a changeable climate...leading to drought,floods...可知必须将上升温度控制在2℃ 以内才可能不会出现危险状况,故选择D项。
【长难句子分析】
—
到目前为止,为减少导致全球变暖的温室气体排放的努力还不足以阻止地球在本世纪气温上升不超出2℃——科学家认为这个数据会带来气候变化的危险,在这样的气候变化中,极端天气会经常发生,会导致干旱、洪涝、庄稼歉收和海平面上升。
阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。
【2017界广东省湛江市二模】
As the new semester begins, millions of college students across the country are trying hard to remember how best to write a paper or, more likely, how best to delay that paper.
Procrastination is the thief of time and a lot of students suffer from it. They can spend whole days in the library doing nothing but staring into space, eating snacks, surfing the Internet, watching videos and looking at other students sitting around them, who, most likely, are doing nothing either.
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