题干
——Our class won the English speaking contest.
——Congratulations! You________ be very proud of it.
A：can
B：would
C：must
答案(点此获取答案解析）
C
——Our class won the English speaking contest.
——Congratulations! You________ be very proud of it.
A：can
B：would
C：must
,则△ABC和△A'B'C'的内切圆的直径的比等于（ ）