复用保护通信设备该如何接地?

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问题:

复用保护通信设备该如何接地?

考点:企业文化企业建设知识竞赛国网知识竞赛国网知识竞赛题库
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What is the most famous building in Australia? It must be the Sydney Opera House. In fact, it is one of the top 10 famous buildings in the world. The Opera House with a “sailing roof” was designed by a famous Danish architect (丹麦建筑大师), Utzon. The base for the building was started in 1959, years before the designs were finished. Utzon spent four years designing the Opera House. In 1962, the designs were finalized (定稿) and the construction began. In 1967, they started the decoration (装璜) inside. It took 14 years in total to build the Opera House. Queen Elizabeth II officially opened it on October 20th, 1973.

The Sydney Opera House cost around $100 million and was paid for by the public (公众). The Opera House includes 1,000 rooms. It is 185 metres long and 120 metres wide. Each year, this fantastic building attracts 200,000 tourists to come for a visit or enjoy events in it.

The Opera House reaches out into the harbour (港湾). It is amazing and unforgettable, offering people a strong sense of beauty.

小题1:The designer of the Sydney Opera House was from    .

A.America

B.Australia

C.England

D.Denmark小题2:The underlined word “construction” means     in Chinese.

A.创立

B.设计

C.施工

D.竣工小题3:Building the Sydney Opera House lasted    .

A.from 1959 to 1973

B.from 1962 to 1973

C.from 1959 to 1967

D.from 1962 to 1967小题4:     paid for the cost of the building of the Sydney Opera House.

A.Utzon

B.The public

C.Queen Elizabeth II

D.The government小题5:Which is the best title for the passage?

A.Sailing Roof

B.Travelling in Sydney

C.The Sydney Opera House

D.The Opening of the Opera House

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阅读分析题:

黑色花为什么很少见,我们生活在姹紫嫣红、色彩缤纷的花的世界里,但是我们看到的黑色花却很少.植物学家对四千多种花的颜色进行了统计,发现只有8种黑色花,而且还不是纯正的黑色,只是偏紫色而已.为什么会出现这种现象呢?原来花的颜色与太阳光及花瓣反射吸收光有关.太阳光是由七种色光(红、橙、黄、绿、蓝、靛、紫)组成.光的颜色不同,其热效应不同.有色不透明物体反射与它颜色相同的光,吸收与它颜色不相同的光,黑色物体吸收各种颜色的光.花瓣比较柔软,为了生存,避免受高温伤害,它们吸收热效应较弱的光,而反射热效应较强的光.这就是我们看到红、橙、黄色花多,而紫、蓝色花较少的缘故.若吸收七种色光,受高温伤害就更大,花也更难生存,所以黑色花很少.

请回答下列问题:

(1)红花反射______色的光,吸收______色的光.

(2)材料中提到“光的颜色不同,其热效应不同”,请你比较:红光的热效应______,蓝光的热效应______.(选填“强”或“弱”)

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关于肝细胞癌的MRI表现,下列说法错误的是()

A.T1WI呈低信号,病变信号不均匀

B.T2WI呈稍高信号,比正常肝组织信号稍高

C.可见假包膜

D.T2WI随回波时间延长,病变信号逐渐增高

E.增强扫描病变可有轻到中度强化

题型:问答题 简答题

闭式旋涡泵与开式旋涡泵相比()。

A.必需汽蚀余量小

B.本身有自吸能力

C.效率较高

D.A和B

题型:问答题 简答题

某钢筋混凝土独立柱,柱基上表面标高为-1.2m,屋面梁底标高+3.3m,现浇屋面板的上表面标高为+3.9m,柱截面尺寸为0.6m*0.6m,则柱的混凝土体积为()

A.1.62m3

B.1.836m3

C.1.188m3

D.1.404m3

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