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问题 多项选择题

开车前对压力容器的安全阀和防爆片检查确认的主要项目是（）。

A、安全阀设定的压力

B、泄压管线畅通

C、防爆片方向正确

D、防爆片压力指示

答案

参考答案：A, B, C, D

单项选择题

某企业2015年度销售收入额为1000万元，营业外收入为100万元，增值额为200万元，利润总额为50万元，缴纳增值税为34万元，该企业的增值税税负率为（）。

A.3.0%

B.3.4%

C.17%

D.68%
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单项选择题

The metric assigned to each network depends on the type of protocol.Some simple protocol, like RIP, treats each network as equals. The（1） of passing through each network is the same; it is one（2）count. So if a packet passes through 10 network to reach the destination, the total cost is 10 hop counts. Other protocols, such as OSPF, allow the administrator to assign a cost for passing through a network based on the type of service required. A （3） through a network can have different costs (metrics). For example, if maximum（4） is the desired type of service, a satellite link has a lower metric than a fiber-optic line. On the other hand, if minimum（5）is the desired type of service, a fiber-optic line has a lower metric than a satellite line. OSPF allow each router to have several routing table based on the required type of Service.

（1）是（）

A.number

B.connection

C.diagram

D.cost
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