电子商务安全运作基本原则中关于双人负责原则的正确表述是（）

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问题单项选择题

A.要明确各工作岗位的责任，要求电子商务人员在严格遵守企业的网络安全制度的前提下完成规定的任务B.任何人不得长期担任与交易安全有关的职务

C.重要业务不要安排一个人单独管理，实行两人相互制约的机制

D.重要业务不要安排一个人单独管理，实行两人或多人相互制约的机制

答案

参考答案：C

单项选择题

( )是实行建设工程监理的必要条件。

A．建设工程审批制

B．建设单位的监理要求

C．建设工程监理的环境因素

D．项目法人责任制

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单项选择题

The following data sufficiency problems consist of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of counterclockwise), you must indicate whether.

At a certain pancake festival with 600 attendees in which every attendee ate at least 1 pancake, how many people had only 1 pancake ？（）
(1) At the festival there were 1,200 pancakes served, and no person had more than 3 pancakes.
(2) Seventy-two percent of the attendees at the festival had 2 or more pancakes.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

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