[单项选择]The articles following this passage would probably be ______. A. articles about how to obtain first-hand experience B. advertisements of different schools C. articles about important decisions D. introductions to summer school courses
第12题: [单项选择]以下所列的外科手术中,不需要预防性使用抗生素的是() A. 胃癌根治术 B. 梗阻性黄疸行胆总管探查术 C. 升结肠癌行右半结肠切除术 D. 空肠平滑肌瘤行肠切除术 E. 以上都不是 参考答案:D 答案解析:空肠平滑肌瘤行肠切除术为相对洁净手术,可不予术前抗生素。故答案应选D。