More than one stage of evaporation can take place by admitting the sea water into chambers with progressively （） pressure in the flash evaporator.<br>A:lower<br>B:higher<br>C:the lower<br>D:the higher

More than one stage of evaporation can take place by admitting the sea water into chambers with progressively （） pressure in the flash evaporator.
A:lower
B:higher
C:the lower
D:the higher

出自：海船船员证

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