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【简答题】
The advantages of some form of international language in the modern world are obvious. Thanks to modern methods of transport, we can travel everywhere more easily and more quickly than ever before, but the language problem still remains. Without a common language, misunderstandings arise and there can be no real communication between people of different nationalities. There are two possible solutions to this problem: either we choose one of the existing major languages of the world, or we make up an artificial one. But neither solution is simple because no existing major language will be acceptable to everyone and because an artificial language, such as Esperanto( 世界语 ), has no literature and would be thought dull by many learners. It is often said that English is quickly becoming a world language. It is certainly the most widely used language in the world, and second only to Chinese in its number of native speakers, but there are certain dangers in choosing English as an international language. First of all, owing to political reasons and national pride, English is not acceptable to everyone as a world language. Many dislike its influence; they see it as a form of interference, perhaps even domination. English words enter their languages and this too causes offence. Although English is being taught in more and more schools abroad, the process is not always popular. Not every nation is prepared to accept the dominant position of a foreign language in their educational system. Another danger is that differences in standard English arise from its use throughout the world. It could break up, with languages developing from dialects( 方言 ) of English. Already Indian teachers and Nigerian students have been unable to understand each other’s English. Questions: 76. Why can we travel more easily nowadays? 77. Why is there no real communication between people of different nationalities? 78. Which language is spoken by more people than any other languages? 79. What do many people dislike about English? 80. Why can’t Indian teachers and Nigerian students understand each other’s English?
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【单选题】当线圈中的磁通减小时,感应电流的磁通( )。
A.
与原磁通方向相同
B.
与原磁通方向相反
C.
与磁通方向无关
D.
无法判断
【单选题】无符号整数一般用于( )
A.
计数
B.
寻址
C.
信号处理
D.
a和b
【单选题】当线圈中磁通减小时,感应电流产生的磁通方向( )
A.
与原磁通方向相反
B.
与原磁通方向相同
C.
与原磁通方向无关
D.
与线圈尺寸大小有关
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A.
正确
B.
错误
【单选题】当线圈中磁通减小时,感应电流的磁通方向( )。
A.
与原磁通方向相反;
B.
与原磁通方向相同
C.
与原磁通方向无关
D.
与线圈尺寸大小有关
【简答题】辅助电路中信号灯的电压为 ,照明灯的电压为 。
【简答题】CA6140车床 辅助电路中信号灯的电压为 ,照明灯的电压为 。
【判断题】经济电流密度是指通过各种经济、技术方面的比较而得出的最合理的电流密度。( )
A.
正确
B.
错误
【单选题】当线圈中磁通减小时,感应电流的磁通方向()。
A.
与原磁通方向无关
B.
与原磁通方向相同
C.
与线圈尺寸大小有关
D.
与原磁通方向相反
【简答题】CA6140车床中,控制电路的电压为____,辅助电路中信号灯的电压为____,照明灯的电压为____。
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