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问题 单项选择题

公司成本管理部会同项目部编制责任成本预算，报公司领导审批后下达，项目部付诸实施，原则上开工后（）内完成。

A.1个月

B.2个月

C.3个月

D.4个月

答案

参考答案：C

选择题

等量异种点电荷的连线和中垂线如图所示，现将一个带负电的试探电荷先从图中点沿直线移动到点，再从点沿直线移动到点，则试探电荷在此过程中（   ）

A．所受电场力的方向不变

B．所受电场力的大小恒定

C．电势能一定减小

D．电势能先不变后减小
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单项选择题

A columnist is discussing how the efficient quantity of output for a good or service is determined. These two statements appear in his column: Statement 1: The equilibrium quantity of production for a good or service can be considered efficient as long as the marginal social benefit of that quantity is greater than its marginal social cost. Statement 2: Subsidies and quotas typically result in production of a good or service in quantities at which the marginal social cost exceeds the marginal social benefit. Are these statements correctStatement 1 Statement 2 （） ①A. CorrectCorrect ②B. CorrectIncorrect ③C. Incorrect Incorrect

A. ①

B. ②

C. ③
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