This text divide six part to can cancel system of the contract expound the fact, analyse, compare and appraise, expect to can cancel contract system have dark understanding and grasp.

本文分六个部分对可撤销合同制度进行了论述、分析、比较和评价，以期对可撤销合同制度有更深的了解和掌握。

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Objective To analyse the CT changes of orbit injuries and to appraise its diagnostic value.

目的评价眼眶外伤的CT诊断的价值。

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