题型:单项选择题 A1型题 关于产妇月经复潮,下列说法不正确的是()A.不哺乳的产妇一般在产后6~8周时月经复潮B.哺乳产妇月经复潮会延迟C.哺乳产妇在哺乳期间,可能月经一直不来潮D.不哺乳的产妇平均在产后4个月左右恢复排卵E.哺乳产妇平均在产后4~6个月恢复排卵 查看答案
题型:单项选择题 项目A和项目B,二者的收益率和标准差如下表所示,如果以变异系数为标准,则投资者的正确决策是( )。A.B.项目AC.项目BD.收益率E.0.06F.0.08G.标准差H.0.08I.0.12 查看答案
题型:选择题 — I ______ to your birthday party last Sunday!— Unfortunately, you were on business. [ ] A. had come B. came C. would come D. would have come 查看答案