78。 Although dozens of New York's small museums are either devoted to local history or various ethnic groups,there are many one -of-a -kind museums from Manhattan to the Bronx that are open for exploration on summer weekends.
C Dozens of NewYork's small museums are devoted to local history or various ethic groups,but there are
D Dozens of NewYork's small museums are devoted to local history or various ethnic groups,and there are also
为什么选D呢？为什么是and的并列关系而不是but的转折关系？那怎么才能从原句中看出是并列关系呢？真是迷茫ING | 
