为什么变压器自投装置的高、低压侧两块电压继电器的无压触点串在启动回路中?

题型:问答题 简答题

问题:

为什么变压器自投装置的高、低压侧两块电压继电器的无压触点串在启动回路中?

考点:电气运行类技术电气运行类技术题库
题型:问答题 简答题

---I have tried very hard to find a solution to the problem, but in vain.

---Why not consult with Frank? You see,         .

A.great minds think alike

B.two heads are better than one

C.a bird in the hand is worth two in the bush.

D.it’s better to think twice before doing something

题型:问答题 简答题

学生心理健康教育中的心理评估,指依据用心理学方法和技术搜集得来的资料,对学生的()与行为表现进行评鉴,以确定其性质和水平进行分类诊断的过程。

题型:问答题 简答题

阅读理解。

    Do you know how to play a game called "Musical Chairs"? It is easy to play and most people enjoy it. All

you need are some chairs, some people and some way of making music. You may use a piano or any other

musical instrument, if someone can play it. You may use a tape recorder. You can even use a radio.

    Put the chairs in a row. The chairs may be put in twos, back to back. A better way is to have the chairs

in one row with each chair facing in the opposite direction to the chair next to it.

    The game is easy. When the music starts, the players walk round the chairs. Everyone goes in the same

direction, of course, they should walk in time to the music. If the music is fast they should walk quickly. If

the music is slow, they should walk slowly.

    The person playing music cannot see the people in the game. When the music stops, the players try to sit

on the chairs. If a person cannot find a chair to sit on, he drops out. Then, before the music starts again, one

chair must be taken away. When the music stops again, one more player will be out.

    At last, there will be two players and only one chair. The one who sits on the chair when the music stops

is the winner.

1. If ten people are playing musical chairs, you must begin with _____. [ ]

A. nine chairs

B. ten chairs

C. eleven chairs

D. one chair

2. Which of the following may be unacceptable according to this article? [ ]

A. A piano

B. A radio

C. A violin

D. A telephone

3. When the music starts, the players must _____. [ ]

A. run about the room

B. get down

C. walk around the chairs

D. sit on the chairs

4. Which of the following statements is NOT true? [ ]

A. The game "Musical Chairs" is not difficult to learn.

B. The last one can't sit on the last chair.

C. The winner can sit on the chair.

D. If the person plays music, he cannot be the winner.

题型:问答题 简答题

通道透明类的Keying视频效果包括()。

A.Alpha调整(Alpha A djust)

B.轨道遮罩(Track Matte Key)

C.图像遮罩(Image Matte Key)

D.蒙板扫除(Garbage Matte)

题型:问答题 简答题

汇入路上交通应该怎么做?()

A.将车驶到高速公路坡道尽头并停车,观察左侧的车辆

B.停车再加速

C.与路上其他车辆相同的速度驶入,在高速公路坡道提高速度,以便并入路上交通

D.应在高速公路坡道上减速

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