一、选择题(本大题共
12个小题,每小题
5分,共60分.在每小题给出的四个选项中,只有一个是符合题目规定的):
1.下列函数中,周期为π,且为偶函数的是
()A.<Object: word/embeddings/oleObject1.bin>
= | sin
<Object: word/embeddings/oleObject2.bin>
|B.<Object: word/embeddings/oleObject3.bin>
= 2sin
<Object: word/embeddings/oleObject4.bin>
·cos<Object: word/embeddings/oleObject5.bin>
C.<Object: word/embeddings/oleObject6.bin>
= cos
D.<Object: word/embeddings/oleObject7.bin>
=cos
<Object: word/embeddings/oleObject8.bin>
2.已知全集
U = Z
,A={1,3,5
},B={<Object: word/embeddings/ ...


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