政府与事业单位的原始凭证主要有？

A. 税收收入
B. 个人存款
C. 事业单位财政资金
D. 预算外资金

A. when HSRP is not supported by the design
B. when multiple vendor devices need to be supported
C. when preempt tuning of the default gateway is needed
D. when a robust method of backing up the default gateway is needed
E. when the design implements Layer 2 between the access switch and the distribution switch
F. when the design implements Layer 3 between the access switch and the distribution switch

A. 正确
B. 错误