- A.0
- B.<img src="//img1.yqda.net/question-name/74/8b5d462eea0ec40060b953da96c37d.jpg" height="27" width="17" />
- C.<img src="//img1.yqda.net/question-name/b6/66ccaf6f329648e235f890a43a7284.jpg" height="24" width="29" />
- D.π
- A.2x-y-1=0
- B.22-y+1=0
- C.22-y+3=0
- D.2x+y-3=0
- A.2x-y-1=0
- B.22-y+1=0
- C.22-y+3=0
- D.2x+y-3=0