根据《环境影响评价技术导则-地下水环境》,下列哪些工作属准备阶段的内容。()
A.进行初步工程分析
B.识别环境影响
C.环境水文地质调查
D.工程分析
参考答案:A, B
Networks can be interconnected by different devices. In the physical layer, networks can be connected by (66) or hubs, which just move the bits from one network to an identical network. One layer up we find bridges and switches, which operate at data link layer. They can accept (67) , examine the MAC address, and forward the frames to a different network while doing minor protocol translation in the process. In the network layer, we have routers that can connect two networks. If two networks have (68) network layer, the router may be able to translate between the packet formats. In the transport layer we find transport gateway, which can interface between two transport connections. Finally, in the application layer, application gateways translate message (69) . As an example, gateways between Internet e-mail and X.400 e-mail must (70) the e-mail message and change various header fields.
A.syntax
B.semantics
C. language
D. format
某县国税局接到群众举报,县属某外贸公司有进货不入账,企图逃税的行为。经相关部门查证核实,该外贸公司确实有逃税的违法行为,责令其在5日内缴足税款。该公司接到通知后的第2天,并未主动缴纳税款,而且还将账户上的大部分资金转走,税务局得到消息后,便责令该公司提供纳税担保。该公司到县政府找到主管部门,主管部门向国税局做了口头纳税担保。国税局不同意,最后该公司以库存原材料做了纳税担保。
国税局不同意该公司主管部门提供的口头纳税担保的原因是( )。
A.主管部门没有经济能力
B.主管部门未作书面保证,口头担保无效
C.主管部门年收益差
D.主管部门无担保人资格