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问题 多项选择题

下列关于热应力的说法哪些不正确（）

A、热应力随约束程度的增大而减小

B、热应力与零外载相平衡，不是一次应力

C、热应力具有自限性，屈服流动或高温蠕变可使热应力降低

D、热应力在构件内是不变的

答案

参考答案：A, D

听力题

C）根据对话内容，从下面方框中选择适当的单词或词组填空，使对话内容完整正确，并将答案填写相应位置上。

By the time he was 13 years old, a rare disease had taken away Erik Weihenmayer’s eyesight. Although he lost his eyesight, he did not lose his 小题1:  . On May 25th, 2001, the 32-year-old man became the first blind person to climb the world’s小题2:   mountain. Erick is not only a world-class mountain climber but also a good skier and skydiver. He小题3: long-distance cycle races and run several marathons. He hopes to become one of the youngest people to climb all of the “Seven Summits”, the highest mountains on each of the world’s seven continents. 小题4:  the best thing he has done, 小题5:, is showing the world that it is possible to overcome even the greatest difficulties.
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单项选择题

根据《城市居住区规划设计规范》的规定，下列关于城市居住区内绿地的基本要求表述中不正确的是( )。

A．新区建设绿地率不应低于30%，旧区改建不宜低于25%

B．应根据居住区不同的规划布局形式，设置相应的中心公共绿地

C．旧区绿地总指标的改造可酌情降低，但不得低于相应指标的60%

D．组团内公共绿地的总指标应不低于0.5m2/人
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