A、<img src="https://learning.mhtall.com/upload/uc_course/1843/B4CE32ECEC2D3E592AE548C1159CD0DC95EBF639.png" alt="">
B、<img src="https://learning.mhtall.com/upload/uc_course/1843/01B3EA53B17DA743924B873CFA57FF127AB5EC89.png" alt="">
C、<img src="https://learning.mhtall.com/upload/uc_course/1843/D24838B6AAB369A44F315D599F3D7067F530E58B.png" alt="">
D、<img src="https://learning.mhtall.com/upload/uc_course/1843/02A69AA98FE1ADAB2410A84E7DA07B190D9C04EB.png" alt="">
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