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時間段的特征時,只要將與之相反的時間段的特征否定掉就可以了?! 〖细拍钔评?: 一個大的集合的兩個方面形成對比,兩者之間存在著互補性關(guān)系,也就是一個的增加意味著另一個的減少。反之,相同。這個比較抽象,我們來看一個例子: 例 如:Both the number and the percentage of people in the United States involved in nonagricultural pursuits expanded rapidly during the half century following the civil war, with some of the most dramatic increases occurring in the domains of transportation, manufacturing, and trade and distribution。 What can be inferred from the passage about the agricultural sector of the economy afte