空间曲线，在点处的法平面必（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/bfc647dd12e84c118c466425a1312203.png
举一反三
- 函数在点（0，0）处（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/430c411bd86f4e9c8d257e2c00d9fbaa.png
- 二元函数在点（0，0）处（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/02db1a6ba95f4cbd80baef6ef13fff09.png
- 内压球形容器的应力为： A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/7a7e20156c8c4502840fc258ffe21c74.png"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/6b137ba6e7464b2c8122eced2a3d45cd.png"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/3c032f5116a04b288400df17925e39c2.png"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/85ca21668f4045e2b864897bc3795fdf.png">
- 偏导数表示曲面被平面所截得的曲线在点 处的切线对轴的斜率。( )http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/1a6c85495a6b43a2b96a41f824fa8017.png
- http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/75f92f05d558450f9e68e52200633e6b.png