Once upon a time, the only ideologically acceptable explanations of mental differences between men and women were cultural. Any biologist who dared to suggest in public that perhaps evolution might work differently on the sexes, and that this might perhaps result in some underlying neurological inequalities, was likely to get tarred and feathered.Today, by contrast, biology tends to be an explanation of first resort in matters sexual. So it is beneficiary to come across an experiment which shows that a newly discovered difference which fits easily, at first sight, into the biological-determinism camp, actually does not belong there at all.Writing in Psychological Science, a team led by ran Spence of the University of Toronto describes a test performed on people"s ability to spot unusual objects that appear in their field of vision. Success at spatial tasks like this often differs between the sexes, so the researchers were not surprised to discover a discrepancy between the two. The test asked people to identify an "odd man out" object in a briefly displayed field of two dozen otherwise identical objects. Men had a 68% success rate. Women had a 55% success rate.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, come up with a "Just So" story to explain it in terms of division of labour on the African savannah, and moved on. However, they did not leave it at that. Instead, they asked some of their volunteers to spend ten hours playing an action-packed, shoot-"em-up video game, called "Medal of Honour: Pacific Assault". As a control, other volunteers were asked to play a decidedly non-action-packed puzzle game, called "Ballance", for a similar time. Both sets were then asked to do the odd-man-out test again.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.That is not surprising, given the different natures of the games. However, the improvement in the women was greater than the improvement in the men—so much so that there was no longer a significant difference between the two. Moreover, that absence of difference was long-lived. When the volunteers were tested again after five months, both the improvement and the lack of difference between the sexes remained. Though it is too early to be sure, it looks likely that the change in spatial acuity—and the abolition of any sex difference in that acuity—induced by playing "Medal of Honour" is permanent.That has several implications. One is that playing violent computer games can have beneficial effects. Another is that the games might provide a way of rapidly improving spatial ability in people such as drivers and soldiers. And a third is that although genes are important, upbringing matters, too.In this instance, exactly which bit of upbringing remains unclear. Perhaps it has to do with the different games that boys and girls play. But without further research, that suggestion is as much of a "Just So" story as those tales from the savannah.
A．describe soldiers of both sexes in a war gameB．identify two strange-looking peopleC．pick out a different object from similar onesD．find out a strange man by describing his features
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女，10月，发热3天，体温39～40℃，咳嗽、流涕，声嘶，口腔颊黏膜充血且粗糙，可见细小白点。对本病诊断最有
女，10月，发热3天，体温39～40℃，咳嗽、流涕，声嘶，口腔颊黏膜充血且粗糙，可见细小白点。对本病诊断最有帮助的体征是A、Koplik斑 B、皮疹形态 C、口周苍白圈，杨梅舌 D、卡他征象 E、指趾端红肿 下列哪项考虑是正确的A、如果持续发热，随之出现斑丘疹，考虑麻疹 B、如果持续发热，并出现淡红色斑丘疹，则为幼儿急疹 C、口腔白色念珠菌感染 D、皮肤黏膜淋巴结综合征的前驱症状 E、如果出现红色粟粒疹，考虑猩红热 针对该病，下列哪项治疗是错误的A、高热时可予物理降温或小剂量退热药 B、烦躁者可适当应用镇静药 C、祛痰止咳 D、注射地塞米松 E、超声雾化
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5岁患儿，8月4日因发热、嗜睡、头痛4天入院。体温40．5℃，浅昏迷，颈强直，双侧瞳孔小，膝跳反射亢进，巴氏征阳性，脑脊液透明色，白细胞数88×106／L，多核0．6，单核0．4，葡萄糖2．7mmol／L，氯化物118mmol／L，蛋白0．8g／L。外周血白细胞15×109／L，中性粒细胞0．75，淋巴细胞0．25。最可能的诊断是
A．中毒性痢疾
B．结核性脑膜炎
C．流行性脑脊髓膜炎
D．流行性乙型脑炎
E．虚性脑膜炎
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