1. But for benzene, when treated with SDM-A there was a turning point in its adsorption isotherm, which corresponding to the dividing point between monomolecular and multimolecular layer adsorption.
   在用SDM-A处理苯的吸附时，出现折线形的吸附等温线，折线的转折点正好是单分子层吸附与多分子层吸附的分界点。

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