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People keep their discovery secret mainly for commercial purposes according to the writer.

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It was____________ that the writer read an article in ESJ which helped him understand the "ghost hair" thing.

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The writer suggests sharing a discovery with other people to avoid being stolen.

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Passage One Questions 26 to 28 are based on the passage you have just heard.

A. Switzerland arranges with neighbouring countries for the use of their ports.
B. Switzerland has many ports of its own to handle exports.
C. Switzerland sends its exports by rail to neighbouring countries.
D. Switzerland has no overseas trade because it has no ports of its own.

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某种中继设备提供运输层及运输层以上各层之间的协议转换，这种中继设备是 (61) 。从OSI协议层次来看，用以实现不同网络间的地址翻译、协议转换和数据格式转换等功能的路由器属于 (62) 范畴。当采用数据报服务时，负责端到端的流量控制的是 (63) 。路由器的主要功能是 (64) 。下列接人方式中， (65) 不属于ISP的接入方式。 65（）

A. 帧中继(PR. )方式
B. 仿真终端方式
C. 专线(DDN)方式
D. ISDN方式

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