()的分析是从乔治.阿克洛夫提出旧汽车市场模型开始的。
A.不对称理论
B.道德风险
C.不利选择
D.委托理论
参考答案:C
— How are you getting along with your project?
— I was about to give up when an idea occurred to me ____ I could work with my roommate Tim. [ ]
A. that
B. how
C. why
D. whether
医院感染监测的内容包括()
A.病原微生物
B.易感人群
C.媒介因素
D.环境
E.以上都是