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【单选题】
已知奇函数 的定义域为 ，且是以2为周期的周期函数，数列 是首项为1，公差为1的等差数列，则 的值为 （ ）A.
0
B.
1
C.
－1
D.
2
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反馈参考答案：
举一反三
【单选题】The miserable fate of Enron's employees will be a landmark in business history, one of those awful events that everyone agrees must never be allowed to happen again. This urge is understandable and no...
A.
Because the company has gone bankrupt.
B.
Because such events would never happen again.
C.
Because many Enron workers lost their retirement savings.
D.
Because it signifies a turning point in economic security.
【简答题】用列举法表示下列集合: (1) 大于3小于9的自然数全体; .
【判断题】After the Enron crisis, Public Company Act was issued by Congress in 25 July, 2002.
A.
正确
B.
错误
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