为了适应工程项目大型化、项目大规模融资及分散项目风险等需求,工程项目管理呈现出新的发展趋势,但不包括( )。
A.统一化
B.集成化
C.国际化
D.信息化
参考答案:A
软件测试是保证软件质量的重要手段,其首要任务是
A.保证软件的正确性
B.改正软件存在的错误
C.发现软件的潜在错误
D.实现程序正确性证明
Spread spectrum simply means that data is sent in small pieces Over a number of the (46) frequencies available for use at any time in the specified range. Devices using (47) spread spectrum (DSSS) communicate by (48) each byte of data into several parts and sending them concurrently on different (49) . DSSS uses a lot of the available (50) , about 22 megahertz (MHz) .
(50)是()
A.rate
B.velocity
C.bandwidth
D.period