下列各项没有应用黑色预警法的是( )。A．商情指数 B．预期合成指数 C．经济波动

（2分）

“体育有无必要参加中考”，向来是学生们议论的话题，至今争论不休，意见难以统一。下面是甲方同学的一段辩词：体育作为中考科目，完全多此一举：其一，体育仅占35分，可同学们为了这点分数，付出了很多锻炼时间，大大影响了其它学科的学习。其二，体育中考成绩对于升学没有太大的参考价值，绝大部分同学都能拿到满分，要么提高标准，增加区分度，否则不如不考。

如果你是乙方的主辩，你怎样针对对方的观点，进行反驳，表述你的理由。（4分）

在通常情况下，下面的关系中，不可以作为关系数据库的关系是______。

A) R1(学生号、学生名、性别)
B) R2(学生号、学生名、班级号)
C) R3(学生号、班级号、宿舍号)
D) R4(学生号、学生名、简历)

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 two doctors might support which of the following statements（）

A. Left-handers stand a better chance of winning than right-handers in violence

B. Left-handers are more likely to commit crimes than the right-handers

C. Left-handers are directly responsible for the violence in traditional societies

D. There is no evidence that left-handers are more violent than right-handers

与转移瘤CT表现不符的是

A．多发散在的环形等密度影
B．多发的结节影
C．灶旁水肿明显
D．位置较表浅
E．无强化

立式油罐的平均试样由上、中、下三个个体试样按（）的比例混合而成。

A、1：2：1

B、1：1：1

C、1：3：1

D、1：5：1