【简答题】已知a,b,c,d都不等于0,并且 a b = c d ,根据分式的基本性质、等式的基本性质及运算法则,探究下面各组中的两个分式之间有什么关系?然后选择其中一组进行具体说明. (1) a c 和 b d ; (2) a+b b 和 c+d d ; (3) a+b a-b 和 c+d c-d (a≠b,c≠d). (提示:可以先用具体数字试验,再对发现的规律进行证明.)
【单选题】James Joyce was a famous ______ whose piece Ulysses has been highly eulogized in the Western literary world as one of the greatest works in the 20th century.