运行中的电容器在运行电压达到额定电压的()倍时应退出运行。 A.1.05 B.1.1

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问题:

运行中的电容器在运行电压达到额定电压的()倍时应退出运行。

A.1.05

B.1.10

C.1.15

D.1.20

考点:用电检查员考试用电检查初级工用电检查初级工题库
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2010年,天津市全市生产总值突破9000亿元。据初步核算,并经国家统计局评估审定.全市生产总值(GDP)完成9108.83亿元,按可比价格计算,比上年增长17.4%。分三次产业看,第一产业实现增加值149.48亿元,增长3.3%;第二产业增加值4837.57亿元,增长20.2%;第三产业增加值4121.78亿元,增长14.2%。

“十一五”期间,天津市生产总值比上一年增长数量最多的年份是()。

A.2007年

B.2008年

C.2009年

D.2010年

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卵园窝

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Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened between. As was discussed before, it was not until the 19th century that the newspaper became the dominant preelectronic mediam, following in the wake of the pamphlet and the book and in the company of the periodical. It was during the same time that the communications revolution speeded up, beginning with transport, the railway, and leading on through the telegraph, the telephone, radio, and motion pictures into the 20th - century world of the motor car and the air plane. Not everyone sees that processin perspective. It is important to do so.

It is generally recognized, however, that the introduction of the computer in the early 20th century, (48) by the invention of the integrated circuit daring the 1960s, radically changed the process, although its impact on the media was not immediately (49) . As time went by, computers became smaller and more powerful, and they became "personal" too, as well as (50) , with display becoming sharper and storage (51) increasing. They were thought of, like people, (52) generations, with the distance between generations much (53) .

It was within the computer age that the term "information society" began to be widely used to describe the (54) within which we now live. The communications revolution has (55) both work and leisure and how we think and feel both about place and time, but there have been (56) view about its economic, political, social and cultural implications. "Benefits" have been weighed (57) "harmful" outcomes. And generalizations have proved difficult.

57()

A.above

B.upon

C.against

D.with

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低温冷藏的温度应控制在()。

A.-4℃

B.0℃以下

C.0~5℃以下

D.2℃~10℃

E.15℃以下,5℃以上

题型:单项选择题

()成为电影史上持续时间最长的电影美学.

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