求教:怎样区分哪部分才是比较的对象? 如题,我遇见比较的题总是犯晕,不知道要比较的到底是哪部分比如此题: In 1982 the median income for married-couple families with a wage-earning wife was $9,000 more than a family where the husband only was employed. (A) a family where the husband only (B) of a family where only the husband (C) that for families in which only the husband (D) a family in which only the husband (E) those of families in which the husband only 此题选C即比较的是the midian income,可是怎么才能看出来比较的是这个而不是families??求各位大虾指教,感谢