试题与答案

学前儿童科学教育环境包括自然环境、物质材料和()等要素。

题型:填空题

题目:

学前儿童科学教育环境包括自然环境、物质材料和()等要素。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B解析: 第五次人口普查得到的65岁以上人口比重为6.96%,比第四次人口普查的比重上升了约1.39%,故第四次人口普查得到的65岁以上人口比重为6.96%-1.39%=5.57%,故选B。

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题型:单项选择题

The United States government publishes guidelines for appropriate nutrient intakes. These are known as the Recommended Dietary Allowances (RDAs) and are updated regularly based on new research in nutrition. RDAs are suggested amounts of calories, protein, and some minerals and vitamins for an adequate diet. For other dietary substances, specific goals must await further research. However, for the U.S. population as a whole, increasing starch and fiber in one’’s diet and reducing calories (primarily from fats, sugar, and alcohol) is sensible. These suggestions are especially appropriate for people who have other factors for chronic diseases due to family history of obesity, premature heart disease, diabetes, high blood pressure, and high blood cholesterol, or for those who use tobacco.Snacks can furnish about one-fourth of the calorie requirements among teenagers. Those snacks should also provide much of the day’’s allowances for protein, minerals, and vitamins. Sandwiches, fruit, and milk make good snacks for active teenagers. Food from the food pyramid may be part of any meal. A grilled cheese sandwich or a bowl of whole-grain cereal is just as nutritious in the morning as it is at noon. In addition, a good breakfast consists of any foods that supply about one-fourth of the necessary nutrients for the day.

A good breakfast should supply about what percentage of the necessary nutrients for the day

A.One-half.

B.One-third.

C.One-fourth.

D.Less than one-fourth.

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