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问题 不定项选择

下列选项中，说法错误的有哪些（）。

A.风场是指局地大气运动的流场

B.风速是指空气在单位时间内移动的垂直距离

C.风频是指某风向占总观测统计次数的百分比

D.风向玫瑰图是统计所收集的多年高空气象资料中16个风向出现的频率

答案

参考答案：B, D

解析：B项错误，风速是指空气在单位时间内移动的水平距离；D项错误，风向玫瑰图是统计所收集的多年地面气象资料中16个风向出现的频率。

选择题
若2m=2，2n=4，则2m-n等于（　　）
A．8B．6C．-2D．
1
2
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单项选择题

TCP/IP (71) layer protocols provide services to the application (72) running on a computer. The application layer does not define the application itself, but rather it defines (73) that applications need — like the ability to transfer a file in the case of HTTE In short, the application layer provides an (74) between software running on a computer and the network itself. The TCP/IP application layer includes a relatively large number of protocols, with HTTP being only one of those. The TCP/IP (75) layer consists of two main protocol options — the Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP).

A．services

B．processes

C．applications

D．address
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