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【简答题】
From good reading we can acquire pleasure, companionship, experience, and instruction. A good book may absorb our attention so completely that for the time being we forget our surroundings and even our identity. Reading good books is one of the greatest pleasures in life. It increases our contentment when we are cheerful, and ease our troubles when we are sad. Whatever may be our main purpose in reading, our contact with good books should never fail to give us enjoyment and satisfaction. With a good book in our hands we would never be lonely. Whether the characters described are taken from real life or are purely imaginary, they may become our companions and friends. The people we meet in books may delight us either because they are like human friends who we hold dear or because they present unfamiliar types whom we are glad to welcome as new friends. Our human friends sometimes may bore us, but the friends we make in books need never make us tire with their company. By turning the page we can dismiss them without any fear of hurting their feelings. When human friends desert us, good books are always ready to give us friendship, sympathy, and encouragement. One of the most valuable gifts given by books is experience. Few of us can travel far from home or have a wide range of experiences, but all of us can lead various kinds of lives through the pages of books. Whether we wish to escape from the seemingly dull realities of everyday life or whether we long to visit some far-off places, a book will help us when nothing else can. Through books the whole world is ours for the asking. The possibilities of our literary experiences are almost unlimited. The beauties of nature, the enjoyment of music, the treasures of art, the triumphs of architecture, the wonders of engineering, are all open to those who read books.
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【简答题】起伏噪声是加性噪声的典型代表,起伏噪声包括( )、( )和宇宙噪声。
【简答题】起伏噪声是加性噪声的典型代表,起伏噪声包括: ( ) 、 ( ) 和 ( ) 。
【简答题】起伏噪声是加性噪声的典型代表,起伏噪声包括: ,散弹噪声,宇宙噪声。
【简答题】起伏噪声是加性噪声的典型代表,起伏噪声包括:_________,_________,__________。
【多选题】起伏噪声是加性噪声的典型代表,起伏噪声包括:
A.
热噪声
B.
散弹噪声
C.
宇宙噪声
D.
人为噪声
【简答题】为什么说电阻热噪声是起伏噪声?起伏噪声有什么特点?
【判断题】起伏噪声、 热噪声、 散弹噪声均可认为是加性高斯噪声。 ( )
A.
正确
B.
错误
【多选题】起伏噪声是加性噪声的典型代表,起伏噪声包括:[填空(1)]、[填空(2)]和[填空(3)]。
A.
[热噪声]
B.
[散弹噪声]
C.
[宇宙噪声]
【判断题】循环过程的特点是经过一次循环, 系统回到原来状态. 那么在P-V图上是不是循环过程总可以用一个闭合曲线表示
A.
正确
B.
错误
【简答题】起伏噪声是加性噪声的典型代表,起伏噪声包括:( )( )( )
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