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单选题
587.When does the skin heat exchanger operate on ground?
A
When the circuit operates in open circuit configuration
B
In closed circuit configuration when the skin temperature is below 11'C(51.8'F)(skin temp.increasing).
C
In close circuit configuration when the skin temperature is above 11'C(51.8'F)(skin temp.increasing).
答案解析
正确答案：B
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