(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.

101（）

A.avoiding

B.clipping

C.choosing

D.deciding

E.dissolving

F.ensuring

G.evolving

H.implementing

I.Knowing

J.solving

女性，40岁。反复口腔溃疡，乏力，口干，间断心悸，超声心动图提示心包积液，24小时尿蛋白0.5g，抗核抗体阳性，可能的诊断是（）

A.干燥综合征

B.系统性硬化症

C.类风湿关节炎

D.系统性红斑狼疮

E.混合结缔组织病