中心角为90°的压力表表盘常采用（）传动机构 齿轮传动。 杠杆传动。 扇形齿轮。 扇形曲面传动。
When designing the Network Admission Control （NAC） Appliance for the Enterprise Campus Network， which of the following requirements would help the designer to narrow down the NAC choices， from Virtual Gateway to Real IP Gateway， or from In-band to Out-band？（） QoS ToS/DSCP values are required to be forwarded transparently。 Device redundancy is required。 Per-user ACL support is required。 Multicast service support is required。
对卡片储值时，客户向发卡储值点缴纳现金或支票，这部分资金成为公司的（）。 油款。 备用金。 油票销售预收款。 客户存款。
Which unique characteristics of the Data Center Aggregation layer must be considered by an Enterprise Campus designer？（） Layer 3 routing between the Access and Aggregation layers facilities the ability to span VLANsacross multiple access switches， which is a requirement for many server virtualization andclustering technologies.。 “East-west” server-to-server traffic can travel between aggregation modules by way of the core，but backup and replication traffic typically remains within an aggregation module.。 Load balancing， firewall service， and other network service are commonly integrated by the useof service modules that are inserted in the aggregation switched.。 Virtualization tools allow a cost effective approach for redundancy in the network design byusing two or four VDCs from the same physical switch.。
非公有制经济是我国社会主义市场经济的（）。 主要组成部分。 基础。 重要组成部分。 可有可无部分。
辅助生产车间发生的固定资产折旧费，可能借记的账户有（）。
