A、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1620627213038f9ec1963db58446b8f5ac7e062133fbcimage1.png"style="width:68px;height:26px;"/> 是偶函数,<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1620627213111abdb02895ffc48c68541de041cf5d7fdimage2.png"style="width:82px;height:26px;"/> 是周期为<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1620627213145b9917a6c8bef4a31a87fca2f4c122baeimage3.png"style="width:24px;height:18px;"/>的周期函数.
B、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1620627213178a0815e42a605451d936faa66a3c9ca70image1.png"style="width:68px;height:26px;"/> 是偶函数,<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1620627213210f9d46a7a80ca4e4b9b5cfce5f2a47a42image4.png"style="width:85px;height:26px;"/> 是周期为<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/16206272132472fa0a2f16e114d0baa2c1297ddfaca42image3.png"style="width:24px;height:18px;"/>的周期函数.
C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1620627213281c478b06e8ad04e1181c412275d154451image5.png"style="width:68px;height:26px;"/> 是偶函数,<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1620627213314ba8605825bc84eb6b4b7c4a0d69bb17fimage6.png"style="width:84px;height:26px;"/> 是周期为<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/16206272133502dfa5ace80d04af8b20c76371c443bebimage7.png"style="width:24px;height:18px;"/>的周期函数.
D、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/16206272133878966d0c63026487b95a27072b71e55beimage8.png"style="width:68px;height:26px;"/> 是奇函数,<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1620627213471136069da243946e2a16854db27fb98e4image6.png"style="width:84px;height:26px;"/> 是周期为<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1620627213522566f9f87a5b146bd9e792c78fa34f938image9.png"style="width:14px;height:14px;"/>的周期函数.