高配房停电检修时,应先停()压、后停()压;先断负荷开关,后断隔离开关。

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问题:

高配房停电检修时,应先停()压、后停()压;先断负荷开关,后断隔离开关。

考点:发电工(动力工)发电工(动力工)题库
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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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用示意图中的简易装置可以进行气体的发生和收集。

(1)实验前应如何检查该装置的气密性?_________________________。

(2)拔开试管a的橡皮塞,加入10mL6mol/L稀硝酸和1g薄铜片,立即将带有导管的橡皮塞塞进试管口,反应开始时速率缓慢,逐渐加快。请写出在试管a中所发生的所有反应的化学方程式_______________。

(3)从反应开始到反应结束,预期在试管a中可以观察到那些现象?请依次逐一写出。___________________。

(4)在反应开始时,可观察到导管b中的水面先沿导管b慢慢上升到一定高度,此后又回落,然后有气泡从管口冒出。试说明反应开始时,导管中水面先上升的原因____________________________。

(5)试管c收集满气体后,用拇指堵住管口将试管取出水槽。将管口向上,松开拇指,此时可观察到的现象是____________________。

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下列设备中.属于输入设备的是( )。

A.打印机

B.显示器

C.鼠标器

D.绘图仪

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女,现在正在行肺癌放疗治疗。结合超声声像图,诊断为()

A.脾转移性癌

B.睥血肿

C.脾梗死

D.脾脓肿

E.睥血管瘤

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在程序运行时,可以通过______方法来移动滚动条的位置。

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