题干
— Would you like to go shopping with me now?
— Sorry, I have to finish my homework before supper.
A：might
B：must
C：can
答案(点此获取答案解析）
B
— Would you like to go shopping with me now?
— Sorry, I have to finish my homework before supper.
A：might
B：must
C：can
与
在它们的一个交点处切线互相垂直，则
的最小值为( )
