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问题 选择题

当高速公路上车辆发生故障时，人员应当疏散到下图哪个位置。

A、位置A
B、位置B
C、位置C
D、位置D

答案

参考答案：D

解析：行车道是不能站人的，从图上可知应该停到D区域。

解答题

生物都是由细胞组成的．只有动物对刺激能做出反应．______（判断对错）
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单项选择题

In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet.
A socket is basically an end point of a communication link between two applications. Sockets that extend over a network connect two or more applications running on (31) computers attached to the net-work. A socket (32) two addresses: (33) . Sockets provide a (34) communication channel between one or more systems. There are (35) sockets separately using TCP and UDP.

A．Email address and IP address

B．MAC address and port address

C．MAC address and IP address

D．port number and IP address
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