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【简答题】
An Englishman was once traveling in Italy. One day he went into a small restaurant to order dinner. He understood very little Italian and couldn’t read the menu(菜单). He knew the word for eggs, and so he ordered eggs. Italy is famous, however, for its mushrooms(蘑菇) with eggs. But he did not know the word for mushrooms. The waiter did not speak a word of English and could not help him. At last, the man took out his pocket a pencil and a piece of paper and very carefully drew a picture of a mushroom on the piece of paper. The waiter looked at the picture of the mushroom for a long while. He did not understand very well, but at last he left. He was gone a long time. After about a half hour he returned. But instead of an order of mushroom, he brought the man a large black umbrella. 小题1:Why did the Englishman go to Italy? A.He went to work in a restaurant. B.He went to buy an umbrella. C.He traveled in Italy. D.He wanted to visit his friends. 小题2:What is Italy famous for? A.Mushroom with eggs. B.Eggs. C.Mushrooms. D.Beautiful umbrella. 小题3:How did the Englishman tell the waiter that he wanted some mushrooms? A.He drew a picture of a mushroom on the table. B.He said “mushrooms” in Italian. C.He showed the waiter a picture of a mushroom. D.He drew a picture of an umbrella. 小题4:What’s the end of the story? A.The Englishman didn’t get what he wanted, but an umbrella. B.The Englishman got mushrooms at last. C.The Englishman left before the waiter came back. D.The Englishman got nothing in the end. 小题5:Which of the following is right according to the passage? A.An American was once traveling in Italy. B.The man knew Italian very well. C.The man told the waiter that he wanted to buy an umbrella. D.The waiter didn’t know English at all.
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【单选题】客运专线ZPW-2000A型移频自动闭塞的发送器采用( )冗余。
A.
N+1
B.
1+1
C.
0.5+0.5
【多选题】ZPW-2000A型移频自动闭塞进行发送器“N+1”倒机试验时,正确的方法是()
A.
断开机柜零层主发送的断路器
B.
在“+1”发送的功出塞孔上可测出与主发送相同的载频,低频及电压
C.
将主发送的断路器接通,主发送的工作灯点亮后再进行下一个区段发送的“N+1”倒机试验
D.
每台主发送都要进行“N+1”倒机试验
【多选题】下列哪些是ZPW-2000A型移频自动闭塞发送器产生的种低频控制信息( )。
A.
10.3
B.
29
C.
11.6
D.
12.9
【判断题】热处理的工艺过程均包括加热、保温和冷却三个过程。
A.
正确
B.
错误
【简答题】ZPW-2000A型移频自动闭塞系统N+1发送器切换时的 、 、功出电平必须与故障区段一致。
【简答题】ZPW-2000A型无绝缘移频自动闭塞发送器的作用是什么?
【判断题】ZPW-2000A型移频自动闭塞的发送器产生的是载频信号。
A.
正确
B.
错误
【判断题】ZPW-2000A型无绝缘移频自动闭塞,发送器能产生18种低频信号、6种载频的高精度、高稳定的移频信号。
A.
正确
B.
错误
【多选题】ZPW-2000A型移频自动闭塞进行发送器“N+1”倒机试验方法是()
A.
断开机柜零层主发送的断路器
B.
在“+1”发送的功出塞孔上可测出与主发送相同的载频,低频及电压
C.
将主发送的断路器接通,主发送的工作灯点亮后再进行下一个区段发送的“N+1”倒机试验
D.
每台主发送都要进行“N+1”倒机试验
【判断题】ZPW-2000A型无绝缘移频自动闭塞发送器的频偏为±11Hz。
A.
正确
B.
错误
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