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【简答题】
Mobile phone has become a problem for middle schools. Some middle schools in Australia have banned students from carrying mobile phones during school hours. Mobile phone use among children has become a problem for the school this year. Several children have got mobile phones as Christmas gifts, and more students will want them. Mary Bluett, an official, said mobile phone’s use is a distraction to students during school hours and it also gives teachers so much trouble in their classrooms. Teachers were also saying that sometimes students might use phone messages to cheat during exams. She said some schools had tried to ban mobile phones. Some parents felt unhappy because they couldn’t get in touch with their children. Many teachers said students should not have mobile phones at school, but if there was a good reason, they could leave their phones at school office. They also said there were many reasons why the students should not have mobile phones at school: they were easy to lose and were a distraction(分散注意力) from studies. Many people say that they understand why parents would want their children to have phones, but they think schools should let the students know when they can use their mobile phones. 小题1:Some middle schools in Australia have banned students from carrying mobile phones ___. A.because they are students B.when they are free C.when they are at school D.because they are children 小题2:We know from the passage that some children get mobile phones from ____. A.the makers and sellers B.the passer-by and strangers C.their parents and friends D.some mobile phone users 小题3:What does the underlined word cheat mean in the passage? A.聊天 B.作弊 C.查询 D.核对 小题4:Some parents felt unhappy because they couldn’t ___during school hours. A.use their mobile phones B.leave their mobile phones at school office C.help the teachers with their work D.get in touch with their children 小题5:The passage tells us that ___. A.students shouldn’t have mobile phones at school except for some special reasons B.it is impossible to ban students from using mobile phone at school C.some parents felt unhappy because they couldn’t use their phones at school D.parents should teach their children how to use mobile phones during school hours
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参考答案:
举一反三
【判断题】若矩阵的某行(或列)是其他行(或列)的线性组合,则det(A) = 0。
A.
正确
B.
错误
【简答题】唐代著名诗人王昌龄在芙蓉楼曾写下什么诗篇?全文是什么?
【单选题】八皇后问题的遗传算法求解。八皇后问题是一个以国际象棋为背景的问题:如何能够在 8 × 8 的国际象棋棋盘上放置八个皇后,使得任何一个皇后都无法直接吃掉其他的皇后?为了达到此目的,任两个皇后都不能处于同一条横行、纵行或斜线上。下图给出了八皇后问题的一个解。回答问题。 八皇后问题的建模。将棋盘抽象为 n × n 的矩阵 ( 此时 n=8 ,但抽象不限于 n=8 ,可以是 n 皇后问题 ) , 表示放置...
A.
( 式 6) 表达的不是八皇后问题的约束
B.
( 式 2) 表达的不是八皇后问题的约束
C.
( 式 3 ) 表达的是八皇后问题的约束,但其和式 1 相重复
D.
( 式 4 ) ( 式 5 ) 与 ( 式 7) 表达的是关于八皇后问题的相同的约束
【单选题】附近有山海关、 孟姜女庙等古迹的海滨风景区是( )。
A.
青岛
B.
连云港
C.
大连——旅顺
D.
北戴河
【简答题】交感缩血管神经分布密度最大的部位是______。
【单选题】八皇后问题的遗传算法求解。八皇后问题是一个以国际象棋为背景的问题:如何能够在8×8的国际象棋棋盘上放置八个皇后,使得任何一个皇后都无法直接吃掉其他的皇后?为了达到此目的,任两个皇后都不能处于同一条横行、纵行或斜线上。下图给出了八皇后问题的一个解。回答问题。 八皇后问题的建模。将棋盘抽象为n×n的矩阵(此时n=8,但抽象不限于n=8,可以是n皇后问题), =1表示放置皇后, =0表示未放置皇后,其目...
A.
· (式6)表达的不是八皇后问题的约束
B.
(式2)表达的不是八皇后问题的约束
C.
(式3 )表达的是八皇后问题的约束,但其和式1相重复
D.
(式4 ) (式5 )与(式7)表达的是关于八皇后问题的相同的约束
【判断题】我们国家标准规定,当采用第三视角画法时,必须在图样中画出第三角画法的识别符号(相关知识)
A.
正确
B.
错误
【单选题】交感缩血管神经分布密度最大的部位是
A.
皮肤
B.
骨骼肌
C.
冠状动脉
D.
E.
肝脏
【多选题】关于变配电所电气设备运行巡视的目的和意义,以下说法正确的有()
A.
变电设备巡视工作是变电运行工作中的一个重要组成部分
B.
设备巡视目的是检查设备运行状态是否良好、是否存在缺陷,设备运行是否稳定可靠
C.
设备巡视工作是检查设备运行状况、掌握设备运行规律、确保安全运行必不可少的基础工作
D.
现代电气设备运行可靠性普遍较高,设备巡视工作可以可以不做。
【单选题】八皇后问题的遗传算法求解。八皇后问题是一个以国际象棋为背景的问题:如何能够在 8 × 8 的国际象棋棋盘上放置八个皇后,使得任何一个皇后都无法直接吃掉其他的皇后?为了达到此目的,任两个皇后都不能处于同一条横行、纵行或斜线上。下图给出了八皇后问题的一个解。回答问题。 八皇后问题的建模。将棋盘抽象为 n × n 的矩阵 ( 此时 n=8 ,但抽象不限于 n=8 ,可以是 n 皇后问题 ) , 表示放置...
A.
八皇后问题的约束包括 ( 式 1) 、 ( 式 3) 、 ( 式 4) 和 ( 式 5)
B.
八皇后问题的约束包括 ( 式 1) 、 ( 式 3) 和 ( 式 6)
C.
八皇后问题的约束包括 ( 式 1) 、 ( 式 3) 和 ( 式 7)
D.
上述有不正确的
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