A、<img src="https://learning.mhtall.com/upload/uc_course/1843/38FFB8F4F34ECBE7F0F45277F6AAB107804559BB.png" alt="">
B、<img src="https://learning.mhtall.com/upload/uc_course/1843/7FE2052DBF702FD336ABC0173AE762856A2EDEFC.png" alt="">
C、<img src="https://learning.mhtall.com/upload/uc_course/1843/BD9B4E4BD54626B0C815E0C8E5F9B93480DB8981.png" alt="">
D、<img src="https://learning.mhtall.com/upload/uc_course/1843/BAF4B980BEBA1228833645F9018DE281825F0A4B.png" alt="">