问题
单项选择题
当冷、热流体的传热膜系数a相差很大时，传热系数K的值接近于（）。
A.其中的较小者
B.其中的较大者
C.（a冷+a热）/2
D.a冷+a热
答案
参考答案：A
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当冷、热流体的传热膜系数a相差很大时，传热系数K的值接近于（）。
A.其中的较小者
B.其中的较大者
C.（a冷+a热）/2
D.a冷+a热
参考答案：A
| 用方框内所给单词的适当形式填空。 | |
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| 1. Alice's clothes are original. They are ___________. 2. My friend is a strange man. I don't like his clothes and ___________. 3. Everyone in my class went to the Great Wall ___________ me. 4. Joe has lost his watch. He is very ___________. 5. His parents ask him to stay at home at night, but he doesn't want to and ___________ with them. 6. Activities ___________ sports, language learning, music and math classes. 7. Most young people ___________ football clubs. 8. Children need organized activities but they also need time and ___________ to play or think. |