Because Web servers are platform and application (71) they can send or request data from legacy or external applications including databases. All replies, once converted into (72) mark-up language, can then be transmitted to a (73) . Used in this way, Intranets can (74) lower desktop support costs, easy links with legacy applications and databases and, (75) all, ease of use.

A．above

B．around

C．about

D．abort

不制热故障应排除加热器系统故障，水路系统故障和（）。

A.冷凝器故障

B.蒸发器故障

C.膨胀阀故障

D.送风系统故障