企业固定资产在时间上的特征是使用年限（ ）

A．超过三个月

B．超过半年

C．超过一年或长于一年的一个经营周期

D．超过三年或长于三年的一个经营周期

Passage One

Why is Thomas Jefferson mentioned in this passage a. As an example of interracial intimacy. b. Because he was a slave owner and was ply against interracial marriages. c. Because he was one of the early advocates of interracial marriages. d. Because he married a black woman.