题干
—Can I help you, sir? —______.
A：Yes, you can help me
B：No, I don’t need any hel
C：Of course, if you like
D：No, thanks, I’m being served
答案(点此获取答案解析）
D
A：Yes, you can help me
B：No, I don’t need any hel
C：Of course, if you like
D：No, thanks, I’m being served
、
为直线，
为平面，若
，
，则
；命题
若