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问题 单项选择题

根据《风景名胜区条例》，下列说法中错误的是（）。

A.禁止违反风景名胜区规划，在风景名胜区内建设宾馆、招待所、培训中心、疗养院以及与风景名胜资源保护无关的其他建筑物

B.禁止违反风景名胜区规划，在风景名胜区内设立各类开发区

C.禁止在风景名胜区内乱扔垃圾

D.禁止在风景名胜区内景物或者设施上刻划、涂污

答案

参考答案：A

解析：根据《风景名胜区条例》第二十七条的规定，禁止违反风景名胜区规划，在风景名胜区内设立各类开发区和在核心景区内建设宾馆、招待所、培训中心、疗养院以及与风景名胜资源保护无关的其他建筑物。

单项选择题

男，64岁，左侧肢体活动障碍3天，化验Hb230g／L，RBC7．0×1012／L，拟诊为真性红细胞增多症引起脑血栓。下列不支持真性红细胞增多症的是（）

A.血氧饱和度>92％

B.红细胞总容量>36ml／kg

C.ACT>55％

D.红细胞生成素水平升高

E.中性粒细胞碱性磷酸酶活性增高
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单项选择题

A transport layer protocol usually has several responsibilties. One is to create a process-to-process communication UDP uses （1）numbers to accomplish this. Another responsibility is to provide control mechanisms at the transport level UDP does this task at a very minimal level. There is no flow control mechanism and there is no （2）for received packet. UDP, however, does provide error control to some extent. If UDP detects an error in the received packet, it will silently drop it.

The transport layer also provides a connection mechanism for the processes. The （3）must be able to send streams of data to the transport layer. It is the responsibility of the transport layer at（4）station to make the connection with the receiver chop the stream into transportable units, number them, and send them one by one. it is the responsibility of the transport layer at the receiving end to wait until all the different units belonging to the same process have arrived, check and pass those that are （5） free, and deliver them to the receiving process as a stream.

（3）是（）

A.jobs

B.processes

C.programs

D.users
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