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Food is irradiated (用辐射处理) to provide the same benefits as when it is proce
Food is irradiated (用辐射处理) to provide the same benefits as when it is proce
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2023-12-13
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问题
Food is irradiated (用辐射处理) to provide the same benefits as when
it is processed by heat, refrigeration, freezing or treated with chemicals to
destroy insects, fungi or bacterium that cause food to spoil or cause human (1) _ ____
disease and to make possible to keep food longer and in better condition in (2)______
warehouses and homes. Irradiated foods are wholesome and nutritional. All (3)______
known methods of food processing and even storing food at room tempera
ture for a few hours after harvesting can lower the content of some nutrients,
such as vitamins. At low doses of radiation, nutrient losses are either not
measurable or, if they can be measured, are not significant.
At the higher doses used to extend shelf life or control harmful bacteria,
nutritional losses are less than or about the same with cooking and freezing. (4)______
The irradiation process involves passing food through an irra
diation field; however, the food itself never contacts with a radioactive (5)______
matter. Also the ionizing radiation used by irradiators is not strong enough (6)______
to disintegrate the nucleus of even one atom of a food molecule.
Irradiation does produce chemical changes in foods. They have been
scrutinized by scientists in making safe assessments of irradiated foods. (7)______
Any kind of treatments causes chemical changes in food. For instance, heat (8)______
treatment, or cooking, produces chemicals that could be called "thermolytic
products." Scientists find the changes in food created by irradiation minor to
that created by cooking. The products created by cooking are so significant (9)______
that consumers can smell and taste them, whereas only a chemist with ex
tremely sensible lab equipment may be able to detect radio lytic products. (10)______ [br] (7)
选项
答案
safe — safety
解析
此题辨析的是同根的名词和形容词作另一个名词的修饰语的问题。同根名词和形容词有时都可以作修饰语,但是含义是不同的。如safe和safety都可以作名词的修饰语,但是含义不同。safe作修饰语的意思是“安全的、不危险的”,如a safe place;safety作修饰语的意思是“关于安全性能的”。文中的意思是“关于安全性的评估”,应该用safety作修饰语。类似的例子还有:blood type&bloody killer;a horrible film&a horrorfilm;gold watch&golden watch等。
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