题干
As a war reporter, Jenny went through a lot of adventurous _________, which contributed to her rich _______in her job.
A：experience; experience
B：experiences; experience
C：experience; experiences
D：experiences; experiences
答案(点此获取答案解析）
B
，宽为 
，圆的半径为 
，求阴影部分的面积(π取3.14). 