A project requires a new server to be set up with the ability to automatically fail over its Ethernet connection to a second connection if a network failure occurs. Which of the following provides greatest resiliency?（）
A. Two switch ports will be needed on a switch, two Ethernet cables will be needed for the server each connecting to two different Ethernet cards, and one IP address will be needed.
B. Two switch ports will be needed on two different switches, two Ethernet cables will be needed for the server each connecting to two different Ethernet cards, and one IP address will be needed.
C. Two switch ports will be needed on two different switches, two Ethernet cables will be needed for the server each connecting to two different Ethernet cards, two different IP addresses will be needed.
D. One switch port will be needed on one switch, a splitter will be needed to split the connection, two Ethernet cables will be needed for the server each connecting to two different Ethernet cards, and two different IP addresses will be needed.
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凭证查询条件可以永久保存，即对经常性的查询，可将其查询条件命名后保存，以后需要按此查询时，只需调出保存的条件即可查找到所需要的凭证。()
A. 正确
B. 错误
我国《反不正当竞争法》规定：经营者不得以排挤竞争对手为目的，以低于成本的价格销售商品。以下情形，属于不正当竞争行为的是（）。
A. 使用知名商品特有的名称、包装、装潢，或者使用与知名商品近似的名称、包装、装潢，造成和他人的知名商品相混淆，使购买者误认为是该知名商品
B. 销售鲜活商品
C. 处理有效期限即将到期的商品或者其他积压的商品
D. 季节性降价；清偿债务、转产、歇业降价销售商品
常发生晕厥的瓣膜病变是（）
A. 肺动脉瓣狭窄
B. 主动脉瓣狭窄
C. 二尖瓣关闭不全
D. 主动脉瓣关闭不全
E. 三尖瓣狭窄
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