A、<img src="https://learning.mhtall.com/upload/uc_course/10023/4CA25697DFEE481F1D4A8934C6FDD9F23BC9708A.png" alt="">
B、<img src="https://learning.mhtall.com/upload/uc_course/10023/DC3447D80FD13ECD5C27E59DA2A28D172A39EF30.png" alt="">
C、<img src="https://learning.mhtall.com/upload/uc_course/10023/86A908D9AEB813CE220A0DAD8FC6FC46EDF8E858.png" alt="">
D、<img src="https://learning.mhtall.com/upload/uc_course/10023/C116BC060A172DA87685CD0A0DB973CE1E78D0D9.png" alt="">
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