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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
30
管理
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.
Economists say that the main spur to the global soybean boom is the emergence of a middle class in China, much of whose newly disposable income has been spent on a richer, more varied diet. Over the past decade, China has been transformed from a net exporter of soybeans to the world’s largest importer in some years of whole soybeans as well as oil and meal byproducts.
选项
A、true
B、false
答案
B
解析
因果关系的理解和判断。根据原文,文中把全球大豆畅销的原因归结为“the emergence of a middle classin China”即“中国中产阶级的出现”,而题干中却将其原因归结为“the risein soybean production in China and its increased export of related products”即“中国大豆产量的增加和相关产品出口的增加”,显然该说法与原文不符,因此,该题的说法是错误的。
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