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Question 32. What does the author say about the driverless car? ==== Passage 7 ==== Attitudes toward new technologies often along generational lines. That is, generally, younger people tend to outnumber older people on the front end of a technological shift. It is not always the case, though. When you look at attitudes toward driverless cars, there doesn't seem to be a clear generational divide. The public overall is split on whether they'd like to use a driverless car. In a study last year, of all people surveyed, 48 percent said they wanted to ride in one, while 50 percent did not. The face that attitudes toward self-driving cars appear to be so steady across generations suggests how transformative the shift to driverless cars could be. Not everyone wants a driverless car now-and no one can get one yet-but among those who are open to them, every age group is similarly engaged. Actually, this isn't surprising. Whereas older generations are sometime reluctant to adopt new technologies, driverless cars promise real value to these age groups in particular. Older adults, especially those with limited mobility or difficulty driving on their own, are one of the classic use cases for driverless cars. This is especially interesting when you consider that younger people are generally more interested in travel-related technologies than older ones. When it comes to driverless cars, differences in attitude are more pronounced based on factors not related to age. College graduates, for example, are particularly interested in driverless cars compared with those who have less education, 59 percent of college graduates said they would like to use a driverless car compared with 38 percent of those with a high-school diploma or less. Where a person lives matters, too. More people who lives in cities and suburbs said they wanted to try driverless cars than those who lived in rural areas. While there's reason to believe that interest in self-driving cars is going up across the board, a person's age will have little to do with how self-driving cars can be becoming mainstream. Once driverless cares are actually available for safe, the early adopters will be the people who can afford to buy them. ==== Question 32. What does the author say about the driverless car? A. It does not seem to create a generational divide. B. It will not necessarily reduce road accidents. C. It may start a revolution in the car industry. D. It has given rise to unrealistic expectations.
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【判断题】若 是齐次线性方程组 的一个基解矩阵, 为任意n n常数矩阵,那么 还是此方程组的基解矩阵。
A.
正确
B.
错误
【单选题】习近平总书记指出 ____ 是民族振兴 社会进步的重要基石、 是国之大计党之大计,对提高人民素质、促进人的全面发展、增强中华民族创新、创造活力、实现中华民族的伟大复兴具有决定性意义。( )
A.
医疗
B.
教育
C.
卫生
D.
安全
【单选题】若 Φ(t) 是线性齐次方程组 的一个基解矩阵,C 为非奇异 常数矩阵,那么 Φ(t)C 是否还是此方程组的基解矩阵 . ( )
A.
不是
B.
C.
也许是
D.
也许不是
【判断题】现代的大学生生活在艾滋病流行的社会里。无论愿意或不愿意,大学生都直接或间接的面临艾滋病的相关问题。 ( )
A.
正确
B.
错误
【单选题】设 阶矩阵 的伴随矩阵 ,若 是非齐次线性方程组 的互不相等的解,则对应的齐次线性方程组 的基础解系【 】
A.
不存在.
B.
仅含一个非零解向量.
C.
含有两个线性无关的解向量.
D.
含有三个线性无关的解向量.
【简答题】若X(t)是齐次线性微分方程组 ,x∈R n 的任一基解矩阵,B是任一n阶非奇异常数矩阵,证明X(t)B也是此方程组的一个基解矩阵。
【判断题】若 是齐次线性方程组 的一个基解矩阵, 为非奇异n n常数矩阵,那么 还是此方程组的基解矩阵。
A.
正确
B.
错误
【单选题】若 是线性齐次方程组 的一个基解矩阵, T 为非奇异 n×n 常数矩阵,那么 T 是否还是此方程的基解矩阵 .
A.
B.
不是
C.
不一定
D.
以上三种都不对
【判断题】现代的大学生生活在艾滋病流行的社会里。无论愿意或不愿意,大学生都直接或间接的面临艾滋病的相关问题。
A.
正确
B.
错误
【单选题】习近平总书记2018年9月10日在全国教育大会上的讲话指出:( )是民族振兴、社会进步的重要基石,是功在当代、利在千秋的德政工程,对提高人民综合素质、促进人的全面发展、增强中华民族创新创造活力、实现中华民族伟大复兴具有决定性意义。
A.
发展
B.
教育
C.
创新
D.
实践
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