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【简答题】
The English policeman has several nicknames but the most frequently used are “copper” and “bobby”. The first name comes form. the verb “to cop” ( which is also slang ) , meaning “to take”or “to capture” , and the second comes form. the first name of Sir Robert Peel , a 19th century politician , who was the founder of the police force as we know it today . An early nickname for the policeman was “peeler” , but this one has died out . Whatever we may call them , the general opinion of the police seems to be a favorable one , except , of course , among the criminal part of the community where the police are given more derogatory nicknames which originated in America , such as “fuzz” or “pig” . Visitors to England seem to be very impressed by the English police . It has , in fact , because standing joke that the visitor to Britain , when asked for his views of the country , will always say , at some point or other , “I think your policemen are wonderful”. Well , the British bobby not always be wonderful but he is usually a very friendly and helpful sort of character . A music-hall song of some years ago was called “If You Want To Know The Time , Ask A Policeman ” . Nowadays , most people own watches but they still seem to find plenty of other questions to ask the policeman . In London , the policeman spend so much of their time directing visitors about the city that one wonders how they ever find time to do anything else . Two things are immediately noticeable to the stranger when he sees an English policeman for the first time . The first is that does not carry a pistol and the second is that he wears a very distinctive type of headgear , the policeman’s helmet . His helmet , together with his height , enables an English policeman to be time it is suggested that the policeman should be given a pistol and than his helmet should be taken form. him , but both suggestions are resisted by the majority of the public and the police themselves . Nowadays British people call the policeman________. A.pig B.peeler C.bobby D.fuzz Which of following statements is TRUE?A.There are fewer criminals in America than in Britain . B.The English police usually leave a deep impression on visitors . C.The English bobby is friendly but not helpful . D.The English police enjoy having pistols . If you see an English policeman for the first time , you will probably notice at once that_______.A.he often tells people time B.he is usually very helpful C.he has a helmet on the head D.he wears special clothes That an English policeman can be seen form some distance is______.A.a standing joke B.of no help C.strange and funny D.of some help Visitors praise the English police because______.A.they are police and helpful B.they obey orders C.they often give thanks D.they are armed with modern equipment
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参考答案:
举一反三
【简答题】二元信源发出符号“0”和“1”的概率相同,信道误码率为1/4。若发送的符号为“0”,接收符号为“1”,则接收端收到该符号后获得的信息量为 bit。(计算结果保留3位有效数字)
【简答题】氧气存在于环境空气中,可以通过气调包装等方式()、()、()存储空间内的氧气含量,保证商品质量
【判断题】用多电极加工法加工型腔的精度低,故不适应于加工尖角、窄缝多的型腔。
A.
正确
B.
错误
【单选题】信息在人脑中的储存和呈现方式,在心理学上被称为知识的 。
A.
直观
B.
系统
C.
表征
D.
网络
【简答题】2PSK系统的基带调制信号码型为( )。
【单选题】若发送”0”符号和发送”1”符号的概率相等,则2PSK信号的功率谱中【 】
A.
离散谱和连续谱都没有
B.
只有离散谱
C.
离散谱和连续谱都有
D.
只有连续谱
【判断题】公路工程高程控制测量的精度和等级选用和公路等级无关。
A.
正确
B.
错误
【简答题】二元信源发出符号“0”和“1”的概率相同,信道误码率为1/4。若发送的符号为“0”,接收符号为“0”,则接收端收到该符号后获得的信息量为 bit。(计算结果保留3位有效数字)
【单选题】若发送”0”符号和发送”1”符号的概率相等,则2PSK信号的功率谱中【 】
A.
只有连续谱
B.
只有离散谱
C.
离散谱和连续谱都有
D.
离散谱和连续谱都没有
【单选题】下列选项中属于程序法的是( )
A.
《中华人民共和国刑法》
B.
《中华人民共和国著作权法》
C.
《中华人民共和国广告法》
D.
《中华人民共和国民事诉讼法》
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