题干
I'd like to take this _________ to thank all of you for your hard work on this project.
A：duty
B：opportunity
C：area
D：disagreement
答案(点此获取答案解析）
B
I'd like to take this _________ to thank all of you for your hard work on this project.
A：duty
B：opportunity
C：area
D：disagreement
与曲线
所围成的封闭图形的面积是
