己知三阶矩阵，E为三阶单位阵，则当常数λ为( )时，齐次线性方程(λE-A)X=0有 发布时间：2017-12-13 17:54 │ 来源：www.tikuol.com 题型：单项选择题 问题： 己知三阶矩阵，E为三阶单位阵，则当常数λ为( )时，齐次线性方程(λE-A)X=0有非零解．A．( 0B．( 3C．( 0或3D．( 0或1
题型：单项选择题 Directions: Complete the following sentences by using the words or phrases in the box. Each word or phrases can only be used once. Note that there is one word or phrase more than you need. A. survivedB. convenientC. performanceD. named afterE. currentlyAB. signsAC. remained AD. explosionAE. reflectedBC. removedBD. expand 1. These books must be ________ from the Reference Room.2. ________, more and more people complain of the more pressure of job than before.3. Nobody knew the cause of the ________.4. Despite their quarrel, they ________ the best of friends. 5. If it is ________, please buy an evening paper for me on your way to the supermarket. 6. When the pressure gets out of control, it can lead to poor ________ and ill health.7. She was ________ her grandmother. 8. By reading children's literature, our imaginations can ________ without limit.9. There were some ________ of improvement in her work. 10. He is the only one who ________ the road accident. 查看答案
题型：单项选择题 有一口不断流出泉水的井，每小时流出泉水量相同，这口井的水如果用8台抽水机，12分钟可以抽完；如果用3台抽水机，36分钟可以抽完；问限定在20分钟抽完，需要______台抽水机． 查看答案
，E为三阶单位阵，则当常数λ为( )时，齐次线性方程(λE-A)X=0有非零解．，E为三阶单位阵，则当常数λ为( )时，齐次线性方程(λE-A)X=0有非零解．