数学基本上感觉80%都是狗狗,数学里就有一道题不太明白,题目每太看懂 DS: national per capital debt loan 是不是$5 in $500 (1)total loan to the nearest 1000,000,000是430,000,000,000 (2) number of people to the nearest 1000000是87,000000 AW:一个什么music公司用了radio promotion, profit增加了,然后说另一clothing公司也应该用 AI: 比较年轻员工好还是年龄大员工好