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问题 单项选择题

根据《现金管理暂行条例》的规定，为了保证开户单位日常零星开支的需要，允许单位预留一部分现金，其金额的最高限额一般按照单位（ ）日常零星开支所需来确定。

A．1～2天

B．2～3天

C．3～5天

D．2～5天

答案

参考答案：C

解析：【解析】根据国务院颁发的《现金管理暂行条例》及实施细则规定，开户银行应当根据开户单位的实际需要，核定开户单位3至5天的日常零星开支所需的库存现金限额。

单项选择题

The network layer provides services to the transport layer. It can be based on either（71）. In both cases，its main job is （72） packets from the source to the destination. In network layer，subnets can easily become congested，increasing the delay and（73）for packets. Network designers attempt to avoid congestion by proper desing,Techniques include （74） policy，caching，flow control，and more. The next step beyond just dealing with congestion is to actually try to achieve a promised quality of service. The methods that can be used for this include buffering at the client，traffic shaping，resource（75），and admission control. Approaches that have been designed for good quality of service include integrated services (including RSVP), differentiatd services, and MPLS.

空白处（74）应选择（）

A．abandonment

B．retransmission

C．checksum

D．synchronism
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单项选择题

（）利用计算机生产的一种模拟环境，通过多种传感设备使用户“投入”到该环境中，实现用户与该环境直接进行自然交互的技术。

A.激光技术

B.扫描技术

C.打印技术

D.虚拟技术
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