(  )。A.1 B.1/4 C.1/3 D.1/2

练习题库2022-08-02  10

问题 (  )。A.1B.1/4C.1/3D.1/2

选项 A.1
B.1/4
C.1/3
D.1/2

答案 C

解析
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