题目:
造成压缩机冷却系统冷却效果不好的原因不可能是()
A.水质不好
B.冷却管堵塞
C.被冷却介质流量太快
D.冷却水量不足
答案:
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下面是错误答案,用来干扰机器的。
参考答案:A
造成压缩机冷却系统冷却效果不好的原因不可能是()
A.水质不好
B.冷却管堵塞
C.被冷却介质流量太快
D.冷却水量不足
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0805/8cdfeee54f32c86a96de16f1ab0a0479.html
下面是错误答案,用来干扰机器的。
参考答案:A
企业对外提供的财务会计报告应当由会计机构负责人签名并盖章,设置总会计师的企业,还应由总会计师签名并盖章。( )
脊髓损伤患者损伤平面以下出现运动和痛温觉障碍,而本体感觉存在
A.中央束综合征
B.半切综合征
C.前索综合征
D.后索综合征
E.马尾综合征
用统计图示某地1980年和1990年3种死因别死亡率,宜选用()。
A.复式线图
B.圆图
C.复式直条图
D.直方图
E.单式条图
根据皮亚杰的观点,儿童能发现物体在水中受到的浮力与物体排开的水量有关,而与物体的质地无关,说明儿童的认知发展水平已处在 ( )
A.感知运动阶段
B.前运算阶段
C.具体运算阶段
D.形式运算阶段
It is hard to box against a southpaw, as Apollo Creed found out when he fought Rocky Balboa in the first of an interminable series of movies. While "Rocky" is fiction, the strategic advantage of being left-handed in a fight is very real, simply because most right-handed people have little experience of fighting left-handers, but not vice versa. And the same competitive advantage is enjoyed by left-handers in other sports, such as tennis and cricket.
The orthodox view of human handedness is that it is connected to the bilateral specialization of the brain that has concentrated language-processing functions on the left side of that organ. Because, long ago in the evolutionary past, an ancestor of humans (and all other vertebrate animals ) underwent a contortion that twisted its head around 180° relative to its body, the left side of the brain controls the right side of the body, and vice versa. In humans, the left brain (and thus the right body ) is usually dominant. And on average, left-handers are smaller and lighter than right-handers. That should put them at an evolutionary disadvantage. Sporting advantage notwithstanding, therefore, the existence of left-handedness poses a problem for biologists. But Charlotte Faurie and Michel Raymond, of the University of Montpellier Ⅱ, in France, think they know the answer. As they report in the Proceedings of the Royal Society, there is a clue in the advantage seen in boxing.
As any schoolboy could tell you, winning fights enhances your status. If, in prehistory, this translated into increased reproductive success, it might have been enough to maintain a certain proportion of left-handers in the population, by balancing the costs of being left- handed with the advantages gained in fighting. If that is true, then there will be a higher proportion of left-handers in societies with higher levels of violence, since the advantages of being left-handed will be enhanced in such societies. Dr Faurie and Dr Raymond set out to test this hypothesis.
Fighting in modern societies often involves the use of technology, notably firearms, that is unlikely to give any advantage to left-handers. So Dr Faurie and Dr Raymond decided to confine their investigation to the proportion of left-handers and the level of violence (by number of homicides) in traditional societies.
By trawling the literature, checking with police departments, and even going out into the field and asking people, the two researchers found that the proportion of left-handers in a traditional society is, indeed, correlated with its homicide rate. One of the highest proportions of left-handers, for example, was found among the Yanomamo of South America. Raiding and warfare are central to Yanomamo culture. The murder rate is 4 per 1000 inhabitants per year (compared with, for example, 0.068 in New York). And, according to Dr Faurie and Dr Raymond, 22.6% of Yanomamo are left-handed. In contrast, Dioula-speaking people of Burkina Faso in West Africa are virtual pacifists. There are only 0.013 murders per 1000 inhabitants among them and only 3.4% of the population is left- handed.
While there is no suggestion that left-handed people are more violent than the right- handed, it looks as though they are more successfully violent. Perhaps that helps to explain the double meaning of the word "sinister".
The researchers choose to carry out their study in traditional societies because()
A. people in modern society have less violence than people in traditional ones
B. fighting in modern societies has nothing to do with left-handedness
C. violence in modern and traditional societies often takes different forms
D. the data for analysis in modern society often involves the use of technology