Passage 23

1.B。根据实验的内容“The test asked people to identify an‘odd man out’object in a briefly displayed field of two dozen otherwise identical objects”可知，是要求实验对象找出和其他物体不同的物体unusual object，因此，选项B为正确答案。

2.B。文章第三、四段在描述实验结果时，指出了“Had they left it at that，Dr.Spence and his colleagues might have concluded that they had uncovered yet another evolved difference between the sexes”“Among the Ballancers，there was no change in the ability to pick out the unusual.Among those who had played‘Medal of Honour’，both sexes improved their performances”由此可见在辨认异物时男女差别几乎不大，因此答案为B选项。(https://www.daowen.com)

3.A。根据上下文“As a control，other volunteers were asked to play a decidedly non-action-packed puzzle game，called‘Ballance’，for a similar time”可知，这两个游戏是两种不同的游戏，作者这样做是为了形成有一个控制组与另一组进行参照和对比，因此选项A选项为正确答案。

4.B。根据第四段可知，玩完暴力游戏后，女性跟男性辨认异物的能力差不多，但是她们的提高程度大，因此，选项中B是错误的。

5.C。文章提到基因不能发生改变，而是能力发生了改变，因此C选项是正确的。A选项显然不正确，因为文章中没有提到“violent games should be widely promoted”。B选项在文章最后一段中有所暗示，“Perhaps it has to do with the different games that boys and girls play”，但这只是一个猜测，不是定论，所以B选项错误。D选项更是明显错误的结论。因此正确答案为C选项。