观察下列单项式:2,-4a,6a2,-8a3,10a4,…,按此规律,则第200

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问题:

观察下列单项式:2,-4a,6a2,-8a3,10a4,…,按此规律,则第2008个单项式是______.

考点:单项式
题型:填空题

While fashion is thought of usually in relation to clothing, it is important to realize that it covers a much wider domain. It is to be found in manners, the arts, literature, and philosophy, and may even reach into certain areas of science. In fact, it may operate in any field of group life, apart from the technological and utilitarian area and the area of the sacred. Its operation requires a class society, for in its essential character it does not occur either in a homogeneous society like a primitive group, or in a caste society.

Fashion behaves as a movement, and on this basis it is different from custom which, by comparison, is static. This is due to the fact that fashion is based fundamentally on differentiation and emulation. In a class society, the upper classes or so-called social elite are not able to differentiate themselves by fixed symbols or badges. Hence the more external features of their life and behavior are likely to be imitated by classes immediately below them, who, in turn, are imitated by groups immediately below them in the social structure. This process gives to fashion a vertical descent. However, the elite class finds that it is no longer distinguishable, by reason of the imitation made by others, and hence is led to adopt new differentiating criteria, only to displace these as they in turn are imitated. It is primarily this feature that makes fashion into a movement and which has led one writer to remark that a fashion, once launched, moves to its doom.

As a movement, fashion show little resemblance to any of the other movements which we have considered. While it occurs spontaneously and moves along in a characteristic cycle, it involves little in the way of crowd behavior and it is not dependent upon the discussion process and the resulting public opinion. It does not depend upon the mechanisms of which we have spoken. The participants are not recruited through agitation. No morale is built up among them. Nor does the fashion movement have, or required, an ideology. Further, since it does not have a leadership imparting conscious direction to the movement, it does not build up a set of tactics. People take part in the fashion movement voluntarily and in response to the interesting and powerful kind of control which fashion imposes on them.

It can be inferred from the passage that a fashion movement ().

A. is a form of expressive behavior

B. contributes a great deal to the way of crowd behavior

C. can boost the morale of its participants

D. functions in the same way as specific social movements

题型:填空题

酸催化水解最易水解的苷是

A.葡萄糖苷
B.鼠李糖苷
C.阿拉伯糖苷
D.果糖苷
E.半乳糖苷

题型:填空题

最近,“美人”一词频繁出现在公众视野,无私救助溺水者的“最美女护士”、尽职尽孝的“最美母亲”、为保护学生而自己身受重伤的“最美女教师”……这些“美人”在生命的某个时刻显示出来的勇敢和大爱折射出人性的光辉,让人们深受感动与震撼。这表明()。

①实现人生价值需要劳动和奉献

②实现人生价值需要社会客观条件

③人生价值的实现取决于正确价值观的引导

④人生价值总是在个人与社会的统一中实现的

A.①②

B.②③

C.①④

D.①③

题型:填空题

继电器触点切换的负载为电感性负载,且切换频率较高时,应为继电器的触点接入浪涌保护电路,常用的方法是()

A、OR法

B、CR法

C、ADN法

D、ORB法

题型:填空题

现代促销组合一般包括那些内容?

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