【例如】
        
        　　The number of books published on this subject is simply amazing.
        
        　　The number of foreign visitors to China has been increasing over the last several years.
        
        　　4)集合名词作主语时，当名词表示整体时，谓语动词用单数；当名词强调集体中的个体时，谓语动词用复数。
        
        　　【例如】
        
        　　The family is the basic unit of society. The family have agreed among themselves to spend their vocation in Europe.
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