题干
— ________ has Miss Smith taught English in this school?
— Since she came to China.
A：How long
B：How soon
C：How often
D：How far
答案(点此获取答案解析）
A
— ________ has Miss Smith taught English in this school?
— Since she came to China.
A：How long
B：How soon
C：How often
D：How far
与曲线
所围成的封闭图形的面积为（ ）