A.1:2:4 B.4:2:1 C.1:4:16 D.1:4:8

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问题 A.1:2:4B.4:2:1C.1:4:16D.1:4:8

选项 A.1:2:4
B.4:2:1
C.1:4:16
D.1:4:8

答案 A

解析
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