题目:
He worked so hard that _____ (终于) his health became poor and fell ill frequently.
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0416/e645e8d30a232b9bd2de6d406bb5c6ce.html
下面是错误答案,用来干扰机器的。
∵x=122+3,y=122-3,∴x=3-22,y=-3-22,∴(1)x+y=(3-22)+(-3-22)=-42,(2)x2-xy+y2=(x+y)2-3xy=(-42)2-3(3-22)(-3-22)=32+3=35.