22.以牛外科手術之無菌操作標準,用以移除蜂巢胃金屬異物之rumenotomy手術屬於下列那一等級?
(A)clean procedure
(B)clean-contaminated procedure
(C)contaminated procedure
(D)dirty procedure
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統計: A(117), B(1356), C(523), D(231), E(0) #1739133
統計: A(117), B(1356), C(523), D(231), E(0) #1739133