河南成教 / 微积分
正确率:100%
1[单选题]
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A.a
B.b
C.c
D.d
<p><img src="http://www.jxjypt.cn/Content/Scripts/ewebeditor10/uploadfile/20170306141448685001.png" _ewebeditor_pa_src="/Content/Scripts/ewebeditor10/uploadfile/20170306141448685001.png" border="0"><br><br></p>
参考答案: