视频多幅照相机的缺点包括（）。 A.容易老化 B.曝光度不易控制 C.分辨率低 D.

光量子的能量正比于辐射的（）。

A.频率

B.波长

C.传播速度

D.周期

在实际应用中，常用的数据传输速率单位有kbps，Mbps，Gbps。1Mbps等于______。

A．1×10³kbps

B．1×10⁶kbps

C．1×10⁹kbps

D．1×10¹²kbps

屋面水平出入口处防水层收头，应压在混凝土踏步下，防水层的泛水并应设护墙挤压保护。( )

拜占廷帝国是怎样由盛转衰的？其原因是什么？给了我们哪些启示？

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A transport layer protocol has several responsibilities, One is to create a process-to-process (program-to-program) communication; TCP uses port （1） to accomplish this. Anotherresponsibility of a transport layer protocol is to create a（2）and error-control mechanism atthe transport level. TCP uses a sliding（3）protocol to achieve flow control. It uses theacknowledgment packet, time-out, and retransmission to achieve （4） control. The transportlayer is also responsible for providing a connection mechanism for the application program. Theapplication program sends （5）of data to the transport layer. It is the responsibility of thetransport layer at the sending station to make a connection with the receiver.

（2）是（）

A.procedure

B.function

C.route

D.flow