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【多选题】
关于毕渥数 Bi 的定义和物理意义,以下说法正确的是( )。A.
毕渥数Bi是导热和对流换热中非常重要的准数
B.
毕渥数Bi中的表面传热系数h是第三类边界条件下的已知量
C.
毕渥数Bi反映了物体内部导热热阻和表面对流换热热阻的相对大小
D.
毕渥数Bi的数值范围 0 ≤ Bi ≤ 1
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举一反三
【单选题】17 Questions 16 to 18 are based on the following passage
A.
He could live by writing.
B.
He could get away from the war.
C.
He could find a better job.
D.
He could find silver and gold.
【单选题】高级语言程序的编译执行方式是()
A.
逐条语句边解释边执行，即每解释一条语句就执行一条语句
B.
将整个程序编译完成后再执行，且不生产目标程序
C.
将源程序编译成机器语言的目标程序，然后执行，生成并保留目标程序
D.
将整个程序解释完毕再执行，且保留解释结果
【单选题】高级语言程序的编译执行方式是().
A.
逐条语句边解释边执行,即每解释一条语句就执行一条语句
B.
将整个程序编译完成后再执行,且不生成目标程序
C.
将源程序编译成机器语言的目标程序,然后执行,生成并保留目标程序
D.
将整个程序解释完毕再执行,且保留解释结果
【单选题】Questions 16 to 18 are based on the following passage. 17.
A.
25%.
B.
30%.
C.
33%.
D.
50%.
【单选题】高级语言程序的编译执行方式是
A.
逐条语句边解释边执行，即每解释一条语句就执行一条语句
B.
将整个程序编译完成后再执行，且不生成目标程序
C.
将源程序编译成机器语言的0标程序，然后执行，生成并保留目标程序
D.
将整个程序解释完毕再执行，且保留解释结果
【单选题】Section C Directions: In this section, you will hear three passages. At the end of each passage, you will hear twoor four questions. Both the passage and the questions will be spoken only once. After ...
A.
2.
B.
3.
C.
4.
D.
5.
【单选题】17 Questions 16 to 18 are based on the passage you have just heard.
A.
They are eager to gain fame.
B.
They want to grow a readership.
C.
They intend to attract teenagers.
D.
They have given up the copyright.
【单选题】Questions 16 to 18 are based on the passage you have just heard.
A.
To attract more sea animals to the testing site.
B.
To drive dangerous sea animals away from the testing site.
C.
To help trace the sea animals being tested.
D.
To determine how sea animals communicate with each other.
【单选题】17 Questions 16 to 18 are based on the passage you have just heard.
A.
How to improve your product in the competitive market.
B.
How to decide your product or service offerings.
C.
How to compete with others in the market.
D.
How to open a small business.
【单选题】17 Questions 16 to 18 are based on the following passage
A.
It does not require changing money.
B.
It may not require changing money.
C.
It is supported by a website for booking hotels.
D.
It allows a free stay to travel around the world.
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