下列各对函数中,不是同一个函数的是( ).
A、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/154563506053157d752e6bf7e4d5ba41318eef1658ed8.png" alt="上传图片"><br>
B、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1545635071569ae9245d1e478426e8fe5219dc92f2e26.png" alt="上传图片"><br>
C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1545635080317c4391aff9c364a15b94efbc100b0e658.png" alt="上传图片"><br>
D、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1545635090520e01e2a57ff6647e0972e82181b5f32ac.png" alt="上传图片"><br>
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