题目内容

Blurt is near________.

A. Whangarei
B. Australia
C. seashore
D. Invercargill

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A.sometimesB.oftenC.usuallyD.seldom

A. sometimes
B. often
C. usually
D. seldom

A.supplyB.findC.100k forD.give

A. supply
B. find
C. 100k for
D. give

A.atB.toC.towardsD.on

A. at
B. to
C. towards
D. on

已知数列{an}的前n项和为Sn,且S2n-1=4n2-2n+1,则Sn等于() (A)n2+n (B)n2+n+1 (C)4n2+l (D)4n2-2n

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