A-A+
Population growth is the sole factor that has
问题详情
Population growth is the sole factor that has widened the gap between developing and developed countries.
A．Y
B．N
C．NG
参考答案
正确答案：B
解析：文章第四自然段第三句...，it is one important variable that...，人口激增是一个导致发达国家与发展中国家的贫富差距扩大的一个重要的变数，而非唯一的因素。
