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问题 选择题

He likes _______ and _______.

A. sing, dance

B. to singing, dancing

C. singing, dancing

D. to sing, dance

答案

答案：C

单项选择题

In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.

To a router, a flow is a (1) of packets that share the same characterstics, such as traveling the same (2) , using the same (3) , having the same kind of security, and so on. A router that supports the handling of flow labels has a (4) table. The table has an entry for each Active flow label; each entry defines the (5) required by the corresponding flow label.

1（）

A．sequence

B．stream

C．Queues

D．flow
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单项选择题

When Akiyama Toyohiro, Japan''s first astronaut, completed his stint in space, he came back down to earth with more than one worry.

A．spell

B．sling

C．sting

D．stink
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