http://image.zhihuishu.com/download/upload/uccmanage/eweb/user/20150720105039754.jpg" _ewebeditor_pa_src="http%3A%2F%2Fimage.zhihuishu.com%2Fdownload%2Fupload%2Fuccmanage%2Feweb%2Fuser%2F20150720105039754.jpg" border="0

（视频5.2.6测试题）http://image.zhihuishu.com/download/upload/uccmanage/eweb/user/20150724091753721.png" _ewebeditor_pa_src="http%3A%2F%2Fimage.zhihuishu.com%2Fdownload%2Fupload%2Fuccmanage%2Feweb%2Fuser%2F20150724091753721.png" border="0

（视频5.1.1测试题）http://image.zhihuishu.com/download/upload/uccmanage/eweb/user/20150721193004260.png" _ewebeditor_pa_src="http%3A%2F%2Fimage.zhihuishu.com%2Fdownload%2Fupload%2Fuccmanage%2Feweb%2Fuser%2F20150721193004260.png" border="0

（视频5.1.2测试题）http://image.zhihuishu.com/download/upload/uccmanage/eweb/user/20150721193146521.png" _ewebeditor_pa_src="http%3A%2F%2Fimage.zhihuishu.com%2Fdownload%2Fupload%2Fuccmanage%2Feweb%2Fuser%2F20150721193146521.png" border="0

（视频5.2.2测试题）http://image.zhihuishu.com/download/upload/uccmanage/eweb/user/20150724085211539.png" _ewebeditor_pa_src="http%3A%2F%2Fimage.zhihuishu.com%2Fdownload%2Fupload%2Fuccmanage%2Feweb%2Fuser%2F20150724085211539.png" border="0

（视频5.2.3测试题）http://image.zhihuishu.com/download/upload/uccmanage/eweb/user/20150724085653538.png" _ewebeditor_pa_src="http%3A%2F%2Fimage.zhihuishu.com%2Fdownload%2Fupload%2Fuccmanage%2Feweb%2Fuser%2F20150724085653538.png" border="0

（视频5.1.1测试题）<img width="142" height="47" src="http://image.zhihuishu.com/download/upload/uccmanage/eweb/user/20150721192817180.png" border="0" _ewebeditor_pa_src="http%3A%2F%2Fimage.zhihuishu.com%2Fdownload%2Fupload%2Fuccmanage%2Feweb%2Fuser%2F20150721192817180.png

<small><big><big><span style="font-size: 18px;<strong><span style="font-size: 18px; color: rgb(0, 128, 128);（4.1定积分基本概念和性质测试题）</span></strong></span></big></big></small><img width="601" height="52" src="http://image.zhihuishu.com/download/upload/uccmanage/eweb/user/20150721134958661.jpg" border="0" _ewebeditor_pa_src="http%3A%2F%2Fimage.zhihuishu.com%2Fdownload%2Fupload%2Fuccmanage%2Feweb%2Fuser%2F20150721134958661.jpg

<big><big><small><big><span style="font-size: 16px;<strong><span style="font-size: 16px; color: rgb(0, 128, 128);（4.1定积分基本概念和性质测试题）</span></strong></span></big></small></big></big><big><big><small>http://image.zhihuishu.com/download/upload/uccmanage/eweb/user/20150721132419567.jpg" _ewebeditor_pa_src="http%3A%2F%2Fimage.zhihuishu.com%2Fdownload%2Fupload%2Fuccmanage%2Feweb%2Fuser%2F20150721132419567.jpg" border="0</small></big></big>

【单选题】NO 2 、NO 2 - 、NO 2 + 键角大小关系正确的是 。 A. NO 2 > NO 2 - >NO 2 + B. NO 2 + >NO 2 >NO 2 - C. NO 2 - > NO 2 >NO 2 + D. NO 2 + > NO 2 - >NO 2