下列哪项不是Jones风湿热诊断标准的主要表现
A．发热B．心脏炎C．多发性关节炎D．环形红斑E．皮下结节
参考答案：A
各种维护报表、值班记录，保存期限（）年，过期的资料经局技术主管批准后方可销毁。
A.一年
B.二年
C.三年
D.四年
(74) is NOT served by building a prototype.
A．It takes the place of the final system
B．It is used as the foundation of the larger projects
C．It assists in estimating the cost of the project
D．It assists in gathering software requirements
