问题 问答题

[说明]
信息处理过程中经常需要将图片或汉字点阵作旋转处理。一个矩阵以顺时针方向旋转90°后可以形成另一个矩阵,如下图所示。


流程图a描述了对n*n矩阵的某种处理。流程图b是将矩阵A顺时针旋转90°形成矩阵B的具体算法。



[问题2]
如果以下3*3矩阵沿顺时针方向旋转90°后所形成的矩阵就是原来的矩阵。


其中,位于*处的元素需要考生填写。请完整地写出该矩阵。

答案

参考答案:[*]

完形填空

第一节 完形填空(共10小题;每小题2分,满分20分)

阅读下面短文,掌握其大意,然后从21~30各题所给的A、B、C和D项中,选出最佳选项,并在答题卡上将该项涂黑。

My father believed that there was mysterious forces at work in the world. One day, when he was lecturing me on these tales, a neighbour woman suddenly entered, with two geese in hands. She smiled   21   and looked frightened.

“Yusef, I have a very    22    problem. These dead geese, they keep shrieking in such a sad voice…”.

My father turned pale. “But dead geese don’t shriek,” my mother cut in.

“You’ll hear for yourself,” replied the woman. And so it happened. It is impossible to   23    what I heard. My hands grew    24    and I wanted to run from the room.

Father was no less    25    than I was. He jumped away from the table. Just then, for the second and the third time, the shriek came again. “Well, I didn’t   26    it, did I?”

Suddenly my mother laughed. “Did you   27    the windpipes?” my mother asked.

“The windpipes? No…”.

Mother took hold of one of the geese, and pulled out the windpipe. She did the same with the other one. I was surprised by my mother’s    28    . “Now, try it again.” I was    29     to hear the geese shriek, but they were dead silent.

“There is always a(an)  30   . Dead geese don’t shriek,” said my mother. “Now go home and cook them for the meal. They won’t make a sound in your pot.”

21. A. nervously                   B. cheerfully                 C. jokingly                   D. surprisingly

22. A. simple                       B. sudden                     C. unusual                    D. interesting

23. A. remember                  B. understand                C. describe                   D. bear

24. A. hot                                   B. cold                         C. still                          D. hard

25. A. curious                      B. excited                     C. frightened                D. interested

26. A. mean                         B. notice                      C. design                      D. imagine

27. A. remove                      B. change                            C. break                       D. block

28. A. action                        B. courage                    C. strength                    D. speed

29. A. trying                        B. pretending                C. expecting                 D. preparing

30. A. fact                           B. truth                        C. method                    D. explanation

单项选择题 A3/A4型题