管道系统分类中，按()分类，可分为低温管道、常温管道、中温管道和高温管道。
A. 管道的设计压力
B. 输送介质工作温度
C. 输送介质的性质
D. 管道的材质
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当电动机绝缘电阻值达到规范要求时，在同一温度下经()h稳定不变时，方可认为干燥完毕。
A. 1
B. 3
C. 5
D. 7
Which of the following does Bruce Nagy NOT offer to do for Dr. Green？
A. Pay him for his appearance
B. Pick him up at the airport
C. Give him a tour of the area
D. Make copies of his handouts
What does Sarah Pittman imply about The Great Haze？
A. It was a best-selling book.
B. It has already been illustrated.
C. It was originally more than 100 pages long.
D. It was originally written at a more difficult level.
What can be inferred about Jack McCarrol？
A. He joined AIE online.
B. He recently joined AIE.
C. He runs his own engineering firm.
D. He wrote a letter of complaint to AIE.
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