试题与答案

下述概念正确的是() A.准确度是指测量值与真实值的接近程度 B.精密度是指相同条件

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题目:

下述概念正确的是()

A.准确度是指测量值与真实值的接近程度

B.精密度是指相同条件下,多次测定结果的相互接近程度

C.误差是指测量值与真实值之差

D.保留时间是指从进样到某一组分在柱后出现最高浓度的时间

E.荧光是指物质分子接受光子能量被激发后,从激发态的最低震动能级返回基态时发射出的光

答案:

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A Recent Erymology of the Word "Culture"“文化”一词的新词源
Look in an old dictionary—say, a pre-1960 Webster’s—and you’ll likely find a definition of culture (1) looks something like this: "1.The cultivation of soil. 2.The raising, improvement, or development of some plant, animal (2) product. " This use of the word has its roots in the ancient Latin word cultura, "cultivation" or "tending," and (3) entrance into the English language had begun by the year 1430. By the time the Webster’s definition above was (4) , another definition had begun to take precedence over the old Latin denotation; culture was coming to mean "the training, (5) , and refinement of mind, tastes, and manners" (Oxford English Dictionary). The OED traces this definition, which today we associate (6) the phrase "high culture," back as far as 1805; by the middle of the 20th century, it was (7) becoming the word’s primary definition.
However, if you try a more modem source, like the American Heritage English Dictionary, (8) find a primary definition of culture which is substantially different than either of the two given above: "The totality (9) socially transmitted behavior patterns, arts, beliefs, institutions, and all other products of human work and thought. " Why such a (10) , and in such a (relatively) short period of time Well, in the past 40 years, the use of the (11) "culture" has been heavily influenced by the academic fields of sociology and cultural anthropology. These fields have gradually brought (12) was once a minor definition of culture (the last of eight definitions given in the old 1958 Webster’s quoted (13) ) into the mainstream.
It is easy to imagine how the US society which was so focused on "socially transmitted (14) patterns" in the sixties would come to need a word to describe the object of its interest. The civil (15) movement during this era brought everyone’s attention to bear on cultural differences within US society, while the Vietnam War (16) to emphasize the position of the US culture in relation to other world cultures.
Over time, these new uses (17) the word culture have eclipsed its older meanings, those associated with cultivation of the land and the production of (18) . You might say that an aspect of US culture over the past 40 years is its fascination with the (19) of culture itself—a fascination which has brought about many changes in the way we speak and the (20) of words which we commonly use.

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王自往请之,曰:“吾国东有齐、中山,北有燕、东胡,西有楼烦、秦、韩之边。今无骑射之备,则何以守之哉?先时中山负齐之强兵,侵暴吾地,系累吾民,引水围鄗;微社稷之神灵,则鄗几于不守也,先君丑之。故寡人变服骑射,欲以备四境之难,报中山之怨。而叔顺中国之俗,恶变服之名,以忘鄗事之丑,非寡人之所望也。”公子成听命,乃赐胡服,明日服而朝。于是始出胡服令,而招骑射焉。

赵武灵王推行胡服骑射的主要原因是什么?

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