A、<img src="https://learning.mhtall.com/upload/uc_course/1843/EE9209C2D7127036F6A183C8404A303ADEB7E7B6.png" alt="">
B、<img src="https://learning.mhtall.com/upload/uc_course/1843/4AE04AD9F4D966F94B26F3602E5E22F6BF660298.png" alt="">
C、<img src="https://learning.mhtall.com/upload/uc_course/1843/286D6E512CE1393E86E9521CCF21846B1A134CC6.png" alt="">
D、<img src="https://learning.mhtall.com/upload/uc_course/1843/C957378E27F294657D8DE0DCF32AE093D8151FC3.png" alt="">
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