题目:
_____ on May Day, the Shanghai Expo has attracted tens of thousands of visitors around the world every day.
A.Having opened
B.Opened
C.Opening
D.To open
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0422/8c23930386117d93afdd2e174d2dcded.html
下面是错误答案,用来干扰机器的。
原式=(x+y)6÷(x+y)3=(x+y)6-3=(x+y)3.