As far as the rank of position is concerned, an associate professor is （）to a professor though they are almost equally knowledgeable.
A、attached
B、previous
C、subsidiary
D、inferior
【正确答案】：D
【题目解析】：attached归属的，附属的；previous先前的；subsidiary辅助的，补充的；inferior在等级、程度或官阶中低的或较低的。句意为：虽然几乎同样有学问，但从职位级别上来说，副教授比教授级别要低。因此应选D
