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问题 选择题

图所示，肺炎双球菌转化实验中，在培养有R型细菌的A、B、C、D四支试管中，依次分别加入从S型细菌中提取的DNA、DNA和DNA酶、蛋白质、多糖，经过培养，检查结果发现有R型细菌转化为S型细菌的是 [ ]

A．

B．

C．

D．

答案

答案：A

多项选择题

证券营业部的客户服务主要包括（　　）。

A．客户需求调查

B．对客户的一般化服务

C．对客户的个性化服务

D．客户服务的创新
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单项选择题

The Border Gateway Protocol (BGP) is an interautonomous system （71） protocol.The primary function of a BGP speaking system is to exchange network （72） information with other BGP system. This network reachability information includes information on the list of Autonomous System (ASs) that reachability information traverses. BGP-4 provides a new set of mechanisms for supporting （73）interdomain routing. These mechanisms include support for advertising an IP （74） and eliminate the concept of network class within BGP.BGP-4 also introduces mechanisms that allow aggregation of routes, including （75） of AS paths. These changes provide support for the proposed supernettting scheme.

72（）

A．secubility

B．reachability

C．capability

D．reliability
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