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问题 单项选择题

地类调查是( )。

A．土地权属调查
B．地籍调查
C．基本农田调查
D．土地利用现状调查

答案

参考答案：D

解析： 地类调查即土地利用现状调查，是指以1:10000比例尺为调查主比例尺，以县级行政区域为基本调查单位对土地的利用状况进行的调查。

单项选择题

市场供给力量与需求力量正好相等时所形成的价格是（）。

A.市场价格

B.供给价格

C.需求价格

D.均衡价格
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单项选择题 共用题干题

● 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 datagrams 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 datagrams．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．

空白处（73）应选择（）

A.data link 

B.transport 

C.network 

D.application
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