在使用电压互感器时，接线要注意的问题有（）。A、按要求的相序_爱下问搜题

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问题多项选择题

在使用电压互感器时，接线要注意的问题有（）。

A、按要求的相序接线；

B、三相电压互感器采取星形连接；

C、二次绕组不允许短路；

D、二次侧应有一点可靠接地。

答案

参考答案：A, C, D

完形填空

Sneaker is a kind of shoe worn by many people all over the world. Some say that the word “sneaker” is another word for tennis shoe,   36   no one really knows where the word came from.   37  say it came from the old English verb “sneak”, which  38   moving silently and quickly. The only thing we are   39  is that when you put on a pair of sneakers, you   40   light-hearted, light-footed and ready to play.
Sneakers of some kind are used by   41   who play tennis, basketball, and other sports. New design has been made   42   for people who run slowly. But perhaps sneakers are   43   used by children in the United States. In fact American children of  44   ages would much rather play in sneakers than anything else, except perhaps  45   at all.
　　New York City once held a poetry contest (诗歌比赛) for children. The subject was only “sneaker”. Thousands of children sent in their  46   and praised the sneakers they love. One prize winner called  47   poem “The Sneaker and the World Peace”. “When everyone is wearing sneakers,” she said, “it will be impossible to   48 .”
American school children can be seen every day   49  sneakers of all colours. They put them on in the morning and take them off  50 . Sneakers are  51  washed. In fact the older and dirtier they are, the  52  loveable they are. When their sneakers wear out (穿破), children hate to throw them off. How do you explain the closeness between  53 ? Perhaps another young   54  in the New York Poetry Contest said it best. “A shoe is just a shoe,” he said. “But a sneaker is a   55 .”

A．excited about

C．surprised at

D．pleased with

C．no children

D．some sneakers

B．compositions

A．the next day

D．in the evening

A．sneakers and other shoes	B．boys and girls
C．children and sneakers	D．winners and sneakers

单项选择题

全年中任意1440分钟（24小时）最大降水量都不足（）时，15个时段各栏均空白。

A.5.0mm

B.10.0mm

C.15.0mm