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问题 问答题 简答题

压力管道巡检维护常见方法有哪些？

答案

参考答案：

压力管道巡检维护常见方法有：直接观察；振动、噪声观察；温度测量；压力测量；流量测量；应力应变测量；管道壁厚测量。

单项选择题

Students can learn mathematics only by exploring it on their own, with generous room for trial and error. For what matters in the long run is not acquiring particular computational skills (since without constant use skills rapidly fade), but knowing how to find and use suitable mathematical tools whenever they become necessary.
If the position expressed above is correct, then each of the following can be true EXCEPT:

A．Mathematics teachers are often afraid that someone will ask a question that they cannot answer, and this insecurity frequently leads to authoritarianism in the classroom.

B．Prospective teachers should themselves learn mathematics as a process of constructing and interpreting patterns, of devising strategies for solving problems, and of discovering the beauties and applications of mathematics.

C．Political leaders must accept responsibility for coordinating a nationwide plan for all levels of instruction if mathematics education is to improve.

D．The most effective method for teaching students mathematics is for teachers to state the definitive rule for solving exercises of a given type and then to insist on rote practice in its proper application.

E．(E) Most current teaching presents mathematics as established doctrine, stressing the production of right answers rather than the ability to communicate reasons.
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单项选择题

设计过程控制包括设计( )控制和设计技术活动控制。

A．准备工作

B．管理工作

C．前期工作

D．收尾工作
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