查人人中国名人网苏芬互不侵犯条约:英语智力题
来源：百度文库 编辑：查人人中国名人网 时间：2024/05/10 11:17:13
There are 60 birds in three trees.
After a while 4 birds fly to the second tree from the first tree and 7 birds fly to the third tree from the second tree .
Then there are 20 birds in every tree.Do you know how many birds are there in every tree at first?
After a while 4 birds fly to the second tree from the first tree and 7 birds fly to the third tree from the second tree .
Then there are 20 birds in every tree.Do you know how many birds are there in every tree at first?
There are 24 birds in the first tree，23 in the second tree，and 13 in the third tree。