A.x+y=π B.x-y=π-4 C.x-y=π D.x+y=π-4

考试题库2022-08-02  0

问题 A.x+y=πB.x-y=π-4C.x-y=πD.x+y=π-4

选项 A.x+y=π
B.x-y=π-4
C.x-y=π
D.x+y=π-4

答案 B

解析
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