哪种感染与病毒的致肿瘤性有密切关系（）。
A.慢病毒感染
B.潜伏感染
C.稳定状态感染
D.整合感染
E.形成包涵体
参考答案：D
The salesman showed her several MP3s and she chose ________ one as she didn't want to spend too much money on it.
A．the less expensive
B．less expensive
C．the least expensive
D．least expensive
下列是技术建议书的附件包括的内容是( )。
A．工作进度计划
B．不可预见费估算
C．工程咨询的经验
D．委托服务范围
