问题 选择题

如图所示是一把铁质剪刀.它的下列自述中一定涉及化学变化的是(  )

A.我的造型及特殊又美观

B.我能剪出各式各样的服饰

C.我经过磨砺会更加锋利

D.我惧怕潮湿的空气,在那里我会变得十分难看

答案

A、铁制剪刀造型既特殊又美观,没有新物质生成,属于物理变化.故选项错误;

B、铁制剪刀剪出各式各样的服饰的过程中只是布的形状发生改变,没有新物质生成,属于物理变化.故选项错误;

C、磨砺铁制剪刀的过程中只是形状发生改变,没有新物质生成,属于物理变化.故选项错误;

D、铁制剪刀生锈的过程中有新物质铁锈生成,属于化学变化.故选项正确;

故选D.

单项选择题

Anthropology is the study of human beings as creatures of society. It (1) its attention upon those. physical characteristics and industrial techniques, those conventions and values, which (2) one community from all others that belong to a different tradition.

The distinguishing mark of anthropology among the social sciences is that it includes for serious study other societies (3) our own. For its purposes any social (4) of mating and reproduction is as significant as our own. To the anthropologist our customs and those of a New Guinea tribe are two possible social schemes for (5) a common problem, and in so far as he remains an anthropologist he is (6) to avoid any weighting of one (7) the other. He is interested in human behavior, not as it is shaped by one tradition, our own, but as it has been shaped by any tradition (8) He is interested in a wide (9) of custom that is found in various cultures, and his object is to understand the way in which these cultures change and (10) , the different forms through which they express themselves and the (11) in which the customs of any peoples function in the lives of the (12) .

Now custom has not been commonly regarded as a (13) of any great moment. The inner workings of our own brains we feel to be uniquely (14) of investigation, but custom, we have a way of thinking, is behavior at its most commonplace. (15) , it is the other way round. Traditional custom is a mass of detailed behavior more astonishing than (16) any one person can ever evolve in individual actions. Yet that is a rather (17) aspect of the matter. The fact (18) first rate importance is the predominant role that custom (19) in experience and belief, and the very great varieties it may (20)

5()

A. meditating on

B. imposing on

C. tangling with

D. dealing with

单项选择题