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在制盐蒸发罐加热室中，传热过程有哪几种热阻？

答案

参考答案：

①蒸汽的冷凝给热阻力；

②管外垢层的传热阻力；

③管壁的传导热阻力；

④管内垢层的传热阻力；

⑤由管内垢层至料液的对流给热阻力。

填空题

当ATP负责列车运行安全时，司机控制台上（）灯亮。
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单项选择题

Darcy Grafton, CFA, purchases a large block of stock on behalf of specific accounts she managed. The stock realized a significant gain in value before the close of business; so Grafton reviewed her accounts again to determine where the block shares should be allocated. According to the Standards of Practice Handbook, Grafton’s most appropriate action is to allocate the shares to:()

A．all accounts equally.

B．all accounts for which she has discretionary authority.

C．only those accounts for which the block shares were originally intended.
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