大电流接地系统中,任何一点发生单相接地时,零序电流等于通过故障点电流的()倍。A、2

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问题:

大电流接地系统中,任何一点发生单相接地时,零序电流等于通过故障点电流的()倍。

A、2

B、1.5

C、1/3

D、1/5

考点:变电运行工考试变电运行工考试题库
题型:单项选择题

阅读下面短文,按照句子结构的语法性和上下文连贯的要求,在空格处填入一个适当的词或者括号中词语的正确形式填空。

Alfred Alder, a famous psychiatrist, had    小题1:      interesting experience. When he was a small boy he got off to a poor start in arithmetic(算术). His teacher got the idea that he had no ability in arithmetic, and told his parents     小题2:     she thought in order that they would not expect too much of him. In this way, they too developed the idea, “ Isn’t    小题3:    too bad that Alfred can’t do arithmetic?” He accepted their mistaken estimate of his ability,    小题4:    (feel) that it was useless to try, and that he was very poor at arithmetic, just as they expected.

One day he became very angry at the teacher and the other students because they laughed when he said he saw how to do a problem which none of the other students had been able to solve.

Adler succeeded   小题5:  solving the problem. This gave him     小题6:    (confident). He rejected the idea that he could not do arithmetic and was     小题7:     (determine) to show them that he could. His anger and his new found faith stimulated him to go at arithmetic problems with a new spirit. He now worked with interest, determination, and purpose, and he soon became   小题8:    (extraordinary) good at arithmetic. He not only proved that he can do arithmetic, but he learned early in life from his own experience ,      小题9:   a person goes at a job    小题10: determination and purpose, he may astonish himself as well as others by his ability.

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TCP协议的主要功能是

A.对数据进行分组

B.确保数据的可靠传输

C.确定数据传输路径

D.提高数据传输速度

题型:单项选择题

经过磁力、荧光、着色等方法探伤的公称直径大于( )mm的高压钢管,应进行内部及内表面的探伤。

A.3

B.6

C.8

D.10

题型:单项选择题

患儿,女,6天,足月顺产,旧法接生。因牙关紧闭7h,抽搐2次入院。查体:体重3900g,身长 51cm,皮肤黄染,牙关紧闭,反应差,苦笑面容,脐窝红肿、有脓性分泌物

患儿的医疗诊断可能为

A.新生儿窒息

B.新生儿败血症

C.新生儿颅内出血

D.新生儿胆红素脑病

E.新生儿破伤风

题型:单项选择题

下面有关局域网的简写,正确的是()

A.LAN

B.WAN

C.3G

D.WAP

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