题目内容

‏非稳态导热的正规状况阶段温度分布主要取决于____条件及物性。

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描述导热物体内部温度扯平能力的物理量为又称,它的定义式为。

管壳式换热器正常运行过程是一个非稳态过程()。

A. 对
B. 错

‎物体温度随时间变化的导热过程称为非稳态导热,温度分布是坐标和时间的函数。 ()

A. 对
B. 错

The word thick in "His room was as black as pitch with the thick darkness" means

A. difficult to see through.
B. growing close together and in large amount.
C. have a large distance between two sides.