A、<img src="https://learning.mhtall.com/upload/uc_course/10023/5D7B3C802719C9E75A94D406331A8522370BB355.png" alt="">
B、<img src="https://learning.mhtall.com/upload/uc_course/10023/CB405EA7B9C20037508E66D98C046F8E1AF3297F.png" alt="">
C、<img src="https://learning.mhtall.com/upload/uc_course/10023/025882FA8CF2C7956BE6EBB85A420FFAFD323C3C.png" alt="">
D、<img src="https://learning.mhtall.com/upload/uc_course/10023/B6F37A5552C942372E57DD0096E799427E11D815.png" alt="">