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问题 单项选择题

从中国贸促会2016年1月例行发布会获悉：2015年，贸促会组织应对了13起经贸摩擦案件，涉案金额达到20多亿美元，并加快构建（）

A、经贸摩擦评估体系

B、经贸摩擦情报体系

C、经贸摩擦预警体系

D、经贸摩擦法律体系

答案

参考答案：C

单项选择题

A pharmaceutical company tested a new diet drug over a two-month period. The test group of 100 dieters lost an average of five pounds per person during the first month, but gained an average of two pounds per person in the second month.（）

All of the following could help explain the results of the experiment except:A. The second month of the test occurred during a holiday season, when people are more likely to gain weight.

B. The diet drug has unpleasant side effects, causing many of the subjects to stop using the drug after the first month.

C. The pharmaceutical company provided low-calorie diets to the test subjects in the first month, but let the dieters choose their own food in the second month.

D. The pharmaceutical company selected for the test people who were 20 to 40 pounds over their ideal weights.

E. The diet drug relies on a metabolic effect that loses efficacy the longer a person takes the drug.
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单项选择题

柴油机共轨系统中的高压油泵的主要作用（）

A.控制回油量

B.控制喷油正时

C.控制喷油量

D.提高所需高压燃油

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