采用IMV--实达联合品牌是属于（）。

大小两个数，大数的小数点向左移动一位，就等于小数，这两个数的和是7.7，这两个数分别是______和______．

静脉注射碘过敏试验，注药后观察反应的常规时间是

A．3min

B．5min

C．15min

D．25min

E．35min

Networks can be interconnected by different devices. In the physical layer, networks can be connected by (11) 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 (12) ,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 (13) network layer, the router may be able to translate between the packer 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 (14) . As an example, gateways between Internet e-mail and X.400 e-mail must (15) the e-mail message and change various header fields.

A. repeaters B. relays C. packages D. modems

2004年，广东国民经济保持平稳快速的发展势头，尤其是二、三产业的快速发展为广东城镇居民收入增加奠定了基础。调查资料显示，2004年广东城镇居民人均可支配收入13627.65元，比上年增长10.1%，人均消费支出10694.79元，增长11.0%。按家庭人口计算，广东城镇居民人均工薪收入11646.42元，增长11.8%。2004年广东城镇居民家庭八大类消费支出除了家庭设备用品及服务支出下降9.9%外，其他七类支出都有不同程度的增长，其中食品支出增长10.3%、衣着支出增长10.7%、医疗保健支出增长5.3%、交通通讯支出增长37.8%、文教娱乐服务支出增长9.8%、居住支出增长0.7%、杂项商品及服务支出增长9.8%。2004年占总调查户数10%的最低收入户(简称低收入户)家庭人均可支配收入3720.10元，增长仅7.3%。

2004年低收入户家庭人均可支配收入增幅比全省平均收入增幅低多少( )

A．9907.55元

B．2.8个百分点

C．72.7%

D．7.3个百分点

使用氟利昂检漏灯检漏时应注意哪些事项？