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【单选题】
间歇干燥过程将某湿物料由含水量0．25 kg水／kg绝干物料降至0．05 kg水／kg绝干物料．测出物料的平衡含水量X为0．007 kg水／kg绝干物料，物料的平衡分压保持pO=pS的最小含水量X=0．2 kg 水／kg绝干物料，干燥过程的临界含水量为XO=0．21 kg 水／kg绝干物料，则降速阶段除去的结合水量为________。A.
0．2 kg水／kg绝干物料
B.
0．15 kg水／kg绝干物料
C.
0．16 kg水／kg绝干物料
D.
0．01 kg水／kg绝干物料
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