若欲对大容积筛选成像，检查非复杂性慢流血管，常先采用( )
A．2D-TOF
B．3D-TOF
C．2D-PC
D．3D-PC
E．黑血法
参考答案：A
下列选项中()取消了邮政的专营权，完全开放了本国市场。
A、中国
B、日本
C、新西兰
D、韩国
The Simple Network Management Protocol (SNMP)is an (66) protocol that facilitates the exchange of management information between (67) . It is part of the Transmission Control Protocol/Internet Protocol(TCP/IP) protocol suite. SNMP enables network (68) to manage network performance, find and sole network problems, and plan for (69) An SNMP -managed network consists of three key components: managed devices , (70) ,and network -management systems .
A. administrators B. agents C. managersD. servers
