题目

在如图四种化合物的化学组成中,“O”中所对应的含义最接近的是() A . ②④ B . ②③ C . ①③ D . ①④ 答案:DHundreds of people leave their villages to seek their ________ in cities. A. fortune B. chance C. luck D. future
生物 试题推荐