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问题 单项选择题

在利率期限结构理论中，______认为长短期债券具有完全的可替代性。

A．固定偏好理论
B．市场分割理论
C．流动性偏好理论
D．市场预期理论

答案

参考答案：D

解析： 在市场预期理论中，某一时点的各种期限债券的收益率虽然不同，但是在特定时期内，市场上预计所有债券都取得相同的即期收益率，即长期债券是一组短期债券的理想替代物，长、短期债券取得相同的利率，即市场是均衡的。

单项选择题

A glue that holds the whole Internet together is the network layer protocol, (71) .Unlike most older network layer protocols, it was designed from the beginning with internetworking in mind. Its job is to provide a (72) way to transport data grams from source to destination, without regard to whether these machines are on the same network or whether there are other networks in between them.

Communication in the Internet works as follows. The (73) layer takes data streams and breaks them up into data grams. Each datagram is transmitted through the Internet, possibly being fragmented into smaller units as it goes. When all the pieces finally get to the destination machine, they are reassembled by the (74) layer into the original datagram. This datagram is then handed to the transport layer, which inserts it into the receiving process’ input stream.

An IP datagram consists of a header part and a text part. The header has a (75) part and a variable length optional part.

75（）

A．40-byte fixed

B．64-byte fixed

C．20～64 bytes variable

D．20-byte fixed
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单项选择题

某行各参与者发送、接收的小额支付业务查询查复应通过小额支付系统办理，（）通过大额支付系统办理小额支付系统业务的查询查复。

A.可以

B.只能

C.也可以

D.不得
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