问题
单项选择题
精馏塔中用循环水做冷介质的是（）。
A、预塔，加压塔
B、加压塔，常压塔
C、预塔，常压塔
D、预塔，加压塔，常压塔
答案
参考答案：C
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精馏塔中用循环水做冷介质的是（）。
A、预塔，加压塔
B、加压塔，常压塔
C、预塔，常压塔
D、预塔，加压塔，常压塔
参考答案：C
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