能解释下列原理的离子反应方程式正确是

A．用明矾作净水剂：Al³⁺+3H₂O=Al(OH)₃↓+3H⁺

B．用小苏打治疗胃酸过多：CO₃^2-+2H⁺=CO₂↑+H₂O

C．用氯化铁溶液腐蚀印刷线路板上的铜：Fe³⁺+ Cu=Fe²⁺+ Cu²⁺

D．用氢氧化钠溶液除去铝表面的氧化膜： Al₂O₃+2OH^-+3H₂O=2[Al(OH)₄]^-

Because Web servers are platform and application (60) ，they can send or request data from legacy or external application including database．All replies，once converted into (61) mark up language，can then be transmitted to a (62) ．Used in this way，Intranets can (63) lower desktop support costs，easy links with legacy application and databases and， (64) all。ease of use．

60（）

A．coupled

B．dependent

C．independent

D．related