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[主观题]

（) layer just above the internet layer.A、Network InterfaceB、TCPC、Host－to－Host Transpor

() layer just above the internet layer.

A、Network Interface

B、TCP

C、Host-to-Host Transport

D、Application

提问人：网友yanweiwei55 发布时间：2022-01-06

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第1题

There are two great mysteries about the beach. One is why human beings flock there by thou

sands, only to prostrate(俯卧) themselves in dense packs of glistening flesh. The other is why the sand goes there. Strange as it seems, oceanographers have never really understood why sand piles up on the shore. Now Douglas Inman and Daniel Conley think they have solved the puzzle.

The puzzle had to do with waves. Though it might seem intuitive that waves carry water to shore, and sand along with it, it's not that simple. The crest(浪尖)of a passing wave lifts a given hit of water upward and landward, but the ensuing trough(波谷) pushes the water back down and Out to sea. Near the bottom, there the sand is, the water was always assumed to just slide back and forth—and the sand with it. "If you take a very aloof look at a beach," says Inman, "you'll realize that if the two motions move sand back and forth the same amount, then all the sand should end up in deep water.'

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What is the primary purpose of this passage？

A．To explain why sand piles up on the beaches.

B．To explain why men only prostrate in the sea.

C．To propose a new explanation of a phenomenon.

D．To refute a misconception.

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第2题

Which of the following means the layer above the dermis？（)

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B.subcutaneous

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第3题

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第4题

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B．data link layer

C．transport layer

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第5题

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第6题

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第7题

●Transport gateways connect byte streams in the transport layer．Application gateways allow

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B．data link layer

C．transport layer

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第8题

Which of the following is the PCBMER layer representing the data classes and value objects that are destined for rendering on user interfaces？

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第9题

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第10题

1) In an hour or so, we were above Egypt, the land of the Pharaohs and the Great Pyramids.

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