A、<img src="https://learning.mhtall.com/upload/uc_course/1843/B8A1EBCAEB4E40EA7CB34C0D48BC2A3B1E0A6211.png" alt="">
B、<img src="https://learning.mhtall.com/upload/uc_course/1843/FA6EDC29EF2B6ECD2B6561FE3BF8A12C8326E3AB.png" alt="">
C、<img src="https://learning.mhtall.com/upload/uc_course/1843/DFD003232F8F412DE74E4F1056D8106AE5C4D147.png" alt="">
D、<img src="https://learning.mhtall.com/upload/uc_course/1843/5251687993C599F2B839AFA1BD1ECB9751912872.png" alt="">