【简答题】是指一种货币能够不受限制地兑换成其他国家的货币的特性。
【单选题】Paul didn’t expect to be selected because of his age. Why was he eventually chosen?
A.
The Committee could see that he would enjoy the experience.
B.
The Committee knew he was a careful and safe driver.
C.
The Committee thought he was keen and would work hard.
【单选题】系统设计阶段的主要活动不包括______
【简答题】第一代计算机所用的电子器件是( )。A. 晶体管
【单选题】系统设计阶段的主要活动不包括________。