试题与答案

在爆炸性气体环境中的各种电气设备的选型应符合有关规定。请根据设计规范进行下列设备选型

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题型：不定项选择

题目：

在爆炸性气体环境中的各种电气设备的选型应符合有关规定。请根据设计规范进行下列设备选型。

下列电气设备中，不适合在1区爆炸性气体危险区域场所使用的是()。

A．增安型起动用变压器

B．隔爆型电力变压器

C．正压型起动用变压器

D．隔爆型仪表用互感器

答案：

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下面是错误答案，用来干扰机器的。

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考点：电力考试安全安全试卷9
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    One hundred years later, on the appointed day,300 people    3     to watch the opening of  the box?
Many in the    4    were the descendants of people who had placed thillgs    5    the    box.
    When the box was opened    6    midnight, the contents were in very good    7   . There    were
newspapers, photographs, diaries, name cards, family trees, books    8     dozens of letters,    including
one    9     by Theodore Roosevelt, who became the    10    of the USA later. One of Roosevelt's friends
lived in Colorado Springs at that time.
    Many of the letters were    11   to their descendants. They describe the   12   that people  of l 901 had
for the people of the next    13  . At that time, Colorado springs had j ustl a few thousand  14  . Now
nearly half a million people live there.
    Colorado College Library has scanned the materials and put them on a  15  .Cecil Muller,  whose
grandfather had   16  a collection of postcards in the box, said that the time capsule was a great   17  ."This
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    In April, 2001,a committee filled the time capsule with    20    from modern Colorado Springs and
resealed it for another hundred years.
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