题目内容

对不能燃烧的有机物进行发酵厌氧处理，最后干燥脱硫产生一种气体叫（）,这就是沼气发电的燃料。

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You are a technician at TestKing. Your newly appointed TestKing trainee wants to know what the CDP is.What would your reply be?（）

A. It is globally enabled by default on Cisco routers.
B. It is globally enabled by default on all routers.
C. It is a proprietary protocol.
D. It is a non-proprietary protocol.
E. It can be used to gather hardware and protocol information about neighbor devices.

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