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问题 问答题 简答题

防止水泥石腐蚀的措施有哪些？

答案

参考答案：（1）根据腐蚀环境的类型，选择适当的水泥品种；

（2）为防止软水和酸的腐蚀，可在其制品表面作保护层；以隔离侵蚀介质与水泥石接触；

（3）提高水泥石的密实度，使水泥石内部毛细孔尽可能减少，提高抗腐蚀能力。

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.

What is the area of square floor X ？（）

(1) The perimeter of the floor is a whole-number multiple of 10.

(2) The diagonal of the floor measures .

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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判断题

由人为原因引起的火灾、车祸、爆炸、中毒等各种事故不属于城市社会治安管理的内容。
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