A. on his own B. by his own C. of his own D. for his own 参考答案:A 答案解析:[解析] A. on one's own意为“独立地”,符合句意。其他选项,B.by his own无此搭配;C.of his own属于某人;D.for his own为自己。均不符合题意。句意为:
第17题: [单项选择]某三甲医院2007年6月共收治住院病人2500人,其中有200人新发医院感染,新感染例次数为250次。同期共有375人存在医院感染。新发医院感染中,50人发生术后切口感染。同期住院病人中共有800人接受了外科手术。经过感染监测实查,发现6月份漏报新发感染人数50人,漏报率及实际医院感染发生率分别为() A. 15%,8% B. 15%,10% C. 15%,15% D. 20%,10% E. 20%,15% 参考答案:D