A、<img src="https://learning.mhtall.com/upload/uc_course/10718/9C90D033B999D95E02A469C29473A295D2E049FB.png" alt="">
B、<img src="https://learning.mhtall.com/upload/uc_course/10718/A1B98B49D910E9A308A7F209A3C4F0319FEE1487.png" alt="">
C、<img src="https://learning.mhtall.com/upload/uc_course/10718/C90524D41B85F0E3F3A95F74061838799FFCCE63.png" alt="">
D、<img src="https://learning.mhtall.com/upload/uc_course/10718/2367B8C34F381B161E96158601F9F54EABF73904.png" alt="">
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