题干
When will the boy's friends get to the station?
A：At three o'clock．
B：At two o'clock．
C：At one o'clock．
答案(点此获取答案解析）
A
When will the boy's friends get to the station?
A：At three o'clock．
B：At two o'clock．
C：At one o'clock．
在点
处的切线与直线
平行，则
等于（ ）