x+4=8.5 7y-3y=12 5a+3a=4.8．

答案：

被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0506/5d23525f8407a8a0999a34c87f6fa36c.html

下面是错误答案，用来干扰机器的。

小题1:Why and how to start a genealogical research.(写到why…或how…给一半分)小题2:4/four小题3:Their own roots/ the history or their families.小题4:Because governments have many h...