什么是二次下电？二次下电的意义？

百白破的初种时间正确的是

A．2月

B．3月

C．4月

D．5月

E．6月

埋地排水用柔性管道施工中，管道敷设的错误做法是( )。

A．管道基础采用砂砾垫基础

B．采用超重机下管时，应用非金属绳索扣系住， 串心吊装

C．管道与检查井的衔接，宜采用柔性接头

D．管道接头一般采用弹性密封圈柔性接头

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

关于抵押物的保全，下列说法正确的有（）。

A．在抵押期间，银行若发现抵押人对抵押物使用不当或保管不善，足以使抵押物价值减少时，有权要求抵押人停止其行为

B．在抵押期间，银行若发现抵押人对抵押物使用不当或保管不善，足以使抵押物价值增加时，有权要求抵押人停止其行为

C．若抵押物价值减少时，银行有权要求抵押人恢复抵押物的价值，或者提供与减少的价值相等的担保

D．若抵押物价值增加时，银行有权要求抵押人恢复抵押物的价值，或者提供与减少的价值相等的担保

E．抵押权与其担保的债权同时存在，债权消失的，抵押权也消失

包车客运的服务规范包括（）。

A.填写包车单

B.约定起始时间、地点、目的地和线路

C.签订包车合同

D.经营熟悉的区域和路线