题目内容
一组向量如果含有零向量，则这组向量必线性无关。
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两个非零向量共线的充要条件是对应坐标成比例。
如果两非零向量互相垂直，则其中一个向量在另一个向量上的射影为零。
Complete the sentences with words below. Change the form where necessary.peerdeliberationpreferenceinitialbrillianceminimal1. Discovering what you are about and what you really want is the _____________ step to finding a satisfying career.2. My decision on which university I should choose was made after much _______________.3. __________ pressure is the strong influence that people of our age have on us. It affects people of all ages, in various aspects of life.4. She is grateful that her parents discovered her ___________ as a musician.5. In many industries it is of interest to understand a customer’s ____________ and traits so as to better serve the customer.6. Though with knowledge of how to write, learners will find it difficult to improve their writing if they put in __________ effort and take little practice.
Replace the underlined words with the correct form of the expressions below. You may need to make other changes.hand in make sense free...from back upbring about put in end up be meant to1. Concrete examples of your skills are more effective in supporting your claims about yourself than mere descriptions.2. When he got an opportunity to get a new job which he thought he was good at, he didn’t hesitate to submit the resignation to his current employer.3. The policy carried out recently makes a positive change in the employment of college students.4. Learning not to be affected by desires means learning how to stay peaceful.5. It has always been difficult to move to the perfect job in one step. So it is reasonable to map out a career strategy that includes logical job-hopping.6. You should make more efforts to learn your professional course, or you may fail in the final exam.7. He dreamed of doing something great and after years of effort, he finally became a great cartoonist.8. When she discovered that she was practically blind in one eye, she didn’t conclude that she was doomed to suffer the misfortune. Instead, she decided to fight back.
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