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问题 单项选择题

料液在蒸发器中滞留时间最短的蒸发器是（）。

A.离心薄膜式

B.升膜式

C.降膜式

D.外加热强制循环式

答案

参考答案：A

判断题

锅炉运行中发现过热器金属超温应立即停炉。
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单项选择题

Soon, more of the information we receive via the Internet could come (31) in digital wrappers.

Wrappers are made up (32) software code that’s targeted to do specific things with the data (33) within them, such as helping to define queries for search engines. They also keep (34) from (35) access to that code.

34（）

A.insiders

B.money

C.outsiders

D.warehouse
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