• 2021-04-14
    空间直线过点,其方向向量是,则直线的对称式方程是 。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/83913f5f8bb349beae5420eb57e94cba.pnghttp://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/c66351c5195f48b29f3ff4fd1e7b4b6d.png
  • http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/4ed9a4845b4746c29e638d0a7a788f77.png

    举一反三

    内容

    • 0

      单击标准工具栏上的( )按钮可以打开“设计中心"面板。1、http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/7a8ef85e77f8490babf1302f6cfb317f.png      2、 http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/9cb75f8a10154a279078690a7149876e.png      3、http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/451fea6688f4480fbf86d1a75006cfdc.png      4、http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/0eeb17dcbe1a455f84981040ae19ef0b.png

    • 1

      若闭区域D是由抛物线http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/c2cce6ef434d42d1846dd63f086bd9c2.png及直线http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/71edcde95b7b408bb8275833b1187e4f.png所围成的闭区域,则http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/14ac0a7fff9c4ba1ad9a342140b961cf.png( &nbsp;&nbsp;&nbsp;&nbsp;)<br>

    • 2

      若http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/5c06779096154f7c8b702d66edce8df1.png在点http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/7d26b1d151c9438485fa20b9ca38af20.png处可微,则偏导数http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/518027493bf540a1a080f49503d0afb3.png一定连续。<br>

    • 3

      点http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/e0f6822f1d7d4e0c95e71ffed4adb0d3.png是函数http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/adec3c1d59974ddf8cb6227a1488dbb5.png的(&nbsp; &nbsp; )

    • 4

      求函数http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/c7a245151812467d85af7a1cf91a4be0.png在点http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/917120f5d9354f20ad871d7acfc759d1.png处全微分,则http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/63eafd5e56d84117ba59026b91c8059e.png(&nbsp;&nbsp;&nbsp;&nbsp;)<br>