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W省A市B县C房地产开发公司利用D村的400亩基本农田，欲建一住宅小区。该项目涉及D村农业人口58户，280人。在此之前，D村人均耕地面积为2．0亩。另外，已知D村耕地被征收前3年平均年产值约为800元／亩。2010年3月1日，C房地产开发公司签订了出让合同，交纳土地出让金6000万元，出让合同约定2010年6月1开工。后由于C房地产公司自身原因，该项目直到2011年5月1日才开始动工建设。同时C房地产公司为提高整体投资效益，准备将临街的地块建成商业门市。

按照规定，C房地产公司应在签订了出让合同后（）日内，支付全部地价款。

A.30

B.60

C.90

D.120

答案

参考答案：B

单项选择题

抽样调查与典型调查都是非全面调查，二者的根本区别在于( )。

A．灵活程度不同

B．组织方式不同

C．作用不同

D．选取调查单位的方法不同
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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.

One implication in this passage is that________.

A．all RDAs have been established

B．not all RDAs have been established yet

C．it’s not important to know RDAs

D．RDAs are necessary only for sick people
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