错构瘤
参考答案：错构瘤：由于某些部位的组织过度增生、结构紊乱所形成的肿物。
The man_____ was an old classmate of mine.
A．you just talked to him
B．who just talked to
C．you just talked to
D．whom you just talked
( )措施专门用于应付项目的技术风险，它可以是一段时间或是一笔资金。
A．预算应急费 B．进度后备 C．技术后备 D．经济应急费
