商业银行贷款，应当遵守资产负债比例管理的规定，其中：贷款余额与存款余额的比例不得超过百分之七十五。

Fusible-link fire dampers are operated by（）.

A.8the heat of a fire melting the link

B.a break-glass and pull-cable system

C.electrical controls on the bridge

D.a mechanical arm outside the vent duct