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患者，男，60岁，因患结石性胆囊炎，拟行择期胆囊切除术，既往有2型糖尿病，冠状动脉粥样硬化心脏病，15年前发生急性心肌梗死，2年前安置人工心脏起搏器。此患者的手术类型属于何种心脏危险性分级（）。
A.
高危手术
B.
中危手术
C.
低危手术
D.
心脏危险一般小于5%
E.
心脏危险一般小于1%
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depend on their own financial resources
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【单选题】Companies with large scale need a way to reach the savings of the public at large. The same problem, on a smaller scale, faces practically every company trying to develop new products and create new j...
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