行政管理组织的种类中，在领导机关领导下，负责组织和管理某一专业行政事务的执行机关是（）。

A.职能机关

B.辅助机关

C.直属机关

D.派出机关

(100) whether to go with a shared or switched fast LAN technology once you start to max out your shared Ethernet of token-ring LAN is tough call. Users and analysts involved in (101) high-speed LANs have learned the benefits of each. However, there are trade-offs to each, and (102) which fast LAN technology to choose is critical for (103) network performance problems and (104) costly purchasing mistakes.

A．avoiding

B．clipping

C．choosing

D．deciding

E．dissolving

F．ensuring

G．evolving

H．implementing

I．Knowing

J．solving