设矩阵 有特征值 ，对应的特征向量为 ， 为（ ）.http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/0f4af44de4bd49b4964eddda18a0be0c.png
举一反三
- 设3阶实对称阵的秩，对应于特征值1和2的特征向量为, 则矩阵为（ 00a0 00a0）.http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/05e8d5ba070a437ca8c9c41b31eaff73.png
- 设一线性分组码的生成矩阵为，则其对应的监督矩阵为（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/cc7b1d630aad40878639581f95f754d5.png
- 下列化合物有旋光性的是( )。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/42754375451947b4a2097a204914e285.png" border="0" vspace="0" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/259cc0f9369441888e4306c19039152f.png" border="0" vspace="0" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/c6798f5eb7e14df7a79f40cdd7d2f42e.png" border="0" vspace="0" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201907/4275928f484d4bad94705297fe159cf0.png" border="0" vspace="0" />
- 波长为<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/91ddb92399a343cc990e393ea7ae49e4.png" />的单色光垂直入射于光栅常数为d、缝宽为a、总缝数为N的光栅上。取<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/d02f9b0d40604921bb6eba164d27ae52.png" />，则决定出现主极大的衍射角<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/294d963ff1564c7e9c98a2ca06a7278c.png" />的公式可写成（ ）。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/7e2fd47a37564a53afe33f3fadb46a41.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/2c25a6b55e74467992e1b3b1d02662d8.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/f852c846c7b642f6bbcaf2bcfa75c310.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/27465a93e5ca42d8a18f9a3222d0e52b.png" />
- 设 ，且存在，则k的值为（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201802/f654a37ec1fd4d339ee3210fb3b8ec44.png