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【简答题】
化学工程中的膜分离技术发展很快，它已被成功地用于分离芳烃，请简述膜分离法的原理。
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A.
involve d in... campaign ... course
B.
love affair...disatrous circumstances...course
C.
loss of life...position...campaign
D.
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A.
strict guidance in proper behavior
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finis
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A.
engaged
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