题目内容

由y=x,x=0,x=2三条线所围成的封闭区域是曲边梯形

A. 对
B. 错

查看答案
更多问题

定积分和不定积分是一回事,只是名字不同而已

A. 对
B. 错

“二十公”以来,正规化建设持续健康发展,取得了突出成效主要表现在( )。

A. 组织机构正规化成效明显
B. 教育训练正规化成效明显
C. 执法执勤正规化成效明显
D. 内务管理正规化成效明显

The roof of the residential building was constructed in August. The waterproof coiled material was paved during the day. It was found that the waterproof coiled material was bulging and leaking during the acceptance after the construction. Explain the causes of the above engineering problems.

The durability of concrete is the comprehensive performance of its resistance to various adverse factors in the working environment, including water penetration, freeze-thaw, carbonization, erosion and so on. Please list the specific measures to improve the durability of concrete.

答案查题题库