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  3. The wavelengths of light and radio waves, unlike high energy gamma radiation, ar

The wavelengths of light and radio waves, unlike high energy gamma radiation, ar

游客2025-01-17  9
问题 The wavelengths of light and radio waves, unlike high energy gamma radiation, are much shorter. [br]  
Nuclear energy is released at the sun’s center as high energy gamma radiation, a form of electromagnetic radiation like light and radio waves, only of very much shorter wavelength.
Hunger is not caused by a global scarcity of food. The world can easily produce enough to feed everyone, without any government support. When people go hungry, it is because they do not have access to food — sometimes for reasons of war or politics, most often because of poverty.
选项 A、true
B、false
答案 A
解析 因果关系判断。关于饥馑问题，文章认为“Hunger is not caused by a global scarcity of food”即“饥饿不是由于全球粮食匮乏造成的”，而且进一步说“…it is becausethey do not have access to food—sometimes for reasons of war or politics，mostoften because of poverty”即“饥饿问题是因为人们由于战争、政治、贫穷等原因而无法得到食物”，显然文章认为饥馑问题与粮食供应的畅通与否有关。因此，题干说解决饥馑问题需要消除粮食供应的障碍而非提高粮食产量的说法是正确的。
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