题目内容

影响膜状凝结的因素有( )。

A. 不凝结气体
B. 管子排数
C. 蒸气流速
D. 蒸气过热度
E. 液膜过冷度及温度分布的非线性

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影响沸腾传热的因素包括( )。

A. 表面结构与状态
B. 过冷度
C. 液位高度
D. 重力加速度
E. 管束的影响

热管的重要特性包括( )。

A. 导热性强
B. 等温性好
C. 冷凝段和蒸发段的热流密度可调整范围大
D. 可以控制热量传递的方向

Fill in the blanks with the words given below. Change the form where necessary. Each word can be used only once.indulgepropelrenowned1.Although he was a famous politician and Prime Minister of Great Britain, Churchill found time to __________in his hobbies of painting and gardening.2.The young actress was lucky to get a major part in a movie which was __________her into fame overnight.3.Many members of the academic staff are internationally __________experts who insist on methodical (有条理的) approaches to the analysis of society.

Fill in the blanks with the words given below. Change the form where necessary. Each word can be used only once.aggravatealleviateapplause1.The external debt problems in the developing countries throughout the world were further __________by the rise in interest rates.2.A new study published this week in the journalSciencesuggests that emotional tears may play a direct role in __________stress.3.At a conference in Beijing, Mr. Li apparently received more __________than any other speaker even though he made the shortest speech of the entire day.

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