A-A+ in 2000 middle age for the average German occu 2022-08-05 19:18:10 问答库 阅读 171 次 问题详情 in 2000,middle age for the average German occurredA.at37.1 years.B.at40 years.C.at39.2 years.D.at 52 years.请帮忙给出正确答案和分析,谢谢! 参考答案 正确答案:B