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标题: 请指教 [打印本页]

作者: lynnshen77 时间: 2006-5-14 12:47
标题: 请指教

Q32:

To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.

have to know a great deal more than now about the social and economic
have to know a great deal more than they do now about the social and economical
would have to know a great deal more than they do now about the social and economical
would have to know a great deal more than they do now about the social and economic
would have to know a great deal more than now about the social and economical

ans,c.me,d.

作者: xizzhu 时间: 2006-5-14 13:52
E 才是对的吧

作者: pumpkin 时间: 2006-5-15 03:04

http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=79830&page=1

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