相关考题
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单项选择题
-1/7,1/7,1/8,-1/4,-1/9,1/3,1/10,()
A.-2/5
B.2/5
C.1/12
D.5/8 -
单项选择题
2,21,(),91,147
A.40
B.49
C.45
D.60 -
单项选择题
5,6,19,17,(),-55
A.15
B.344
C.343
D.11
