测量用电流度互感器在额定频率,额定功率因数及二次负荷为()到()之间的任一数值时,其

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问题:

测量用电流度互感器在额定频率,额定功率因数及二次负荷为()到()之间的任一数值时,其误差不得超过相应准确度级别所规定的允许误差。

考点:电磁计量钳工中级计量钳工(电磁)中级计量钳工(电磁)题库
题型:填空题

有绿灯,就必有红灯,绿灯可亲,红灯可爱,少了谁都不行。没有红灯的阻止,哪来绿灯的通达?没有红灯的警示,哪来绿灯的畅快呢?

交通标志是交通规则的重要组成部分。请你观察下图,并完成下列题目。

(1)请你任选其中两副交通标志说出其中的含义?

__________________________________________________________________________________________________________________________________________________________________

(2)即使在没有交警的情况下,你也能够遵守交通规则吗?为什么?

__________________________________________________________________________________________________________________________________________________________________

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下面的文段中,填入横线处最恰当的一项是(3分)( )

每个人的前面,都有一条通向远方的路,___。___,因为总有人因为没倒掉鞋里的沙子而疲惫不堪半途而废。所以___,而是心情。(3分)

①充满希望但崎岖                      ②崎岖但充满希望

③不是人人都能走到远方                ④没有人能走到远方

⑤人的感受并非受快乐和痛苦本身主宰    ⑥主宰人的感受并非快乐和痛苦本身

A.①③⑤   B②③⑥   C ①④⑥    D②④⑤

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Are you a man or a mouse When people ask this question they want to know (1) you think you are a (2) person or a coward. But you will never really know the answer to this question (3) you are tested in real life. Some people (4) they are brave but when they come face to face with real (5) , they act like cowards. Others think of themselves as cowards, but when they meet danger, they act like (6)

Lenny had always thought of himself as a (7) person. He got worried before examinations. He worried about his job and health. All he wanted in life was to be safe and healthy. (8) , on January 15th, 2002, a plane crashed into the Potomac River in Washington. Lenny went to the river to see what was happening. He saw a woman in the (9) water. Lenny did not feel afraid. He kept very (10) and did a very dangerous thing. He jumped into the Potomac, (11) to the woman, and kept her head (12) the water. Seventy-eight people died that day. Thanks to Lenny, it was not (13) .

When you are in a very (14) situation and feel afraid, the body automatically produces a chemical in the blood. The chemical is called adrenalin. (15) adrenalin in the blood system, you actually feel per and per and are (16) to fight or run away. However, when you are absolutely terrified, the body can produce too much adrenalin. When this (17) , the muscles become very hard and you find you (18) move at all. You are then paralyzed with fear. This is (19) when we are very frightened, we sometimes say we’re "petrified". This word comes from the Greek word "petros", which means "stone". We are (20) frightened that we become stonelike.

4()

A.realize 

B.find 

C.think 

D.agree

题型:填空题

设备伪影不可能由下面哪种因素引起()

A.机器主磁场强度

B.磁场均匀度

C.软件质量

D.磁体重量

E.附属设备

题型:填空题

差动保护是主变系统的主保护。

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