热量传递的方式主要有三种:( )、( )、( ),在平壁导热过程中q=λA(t1-t2)/δ,传热推动力是()。
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黑体的表面温度从300℃升至600℃,其辐射能力增大到原来的()倍。(保留两位小数点)
Mr. Fool tried to move _______________________ ① in front of his house with his family.
Mr. Wise _______________________ ② him and tried to stop him.
Mr. Fool refused him and ______________________ ③ with his family.