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【单选题】
连续精馏塔操作时 , 增大塔釜加热蒸汽用量,若回流量和进料的 F 、 XF 、 q 都不变,则 L'/V'( ) 。A.
增大
B.
减少
C.
不变
D.
不确定
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A.
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B.
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C.
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A.
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B.
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C.
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A.
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B.
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C.
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