同步分离电路输出脉冲,要有()左右的输出幅度,以便控制扫描电路。
A、1~2V
B、2~4V
C、5~10V
D、10~12V
参考答案:C
以下几个步骤对建立工作分解结构排序正确的是( )。 ①确定工作分解结构的结构与编排 ②对工作分解结构的各个组成部分进行编码 ③将工作分解结构的上层分解到下层的组成部分 ④核实工作分解的程度是否必要和已经满足控制要求 ⑤识别可交付成果与有关工作
A.①⑤③②④
B.⑤③①②④
C.⑤①④②③
D.⑤①③②④
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 HTTP. 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.application
B.transport
C.link
D.network