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问题 单项选择题

我国电力建设的方针之一是( )核电。

A．积极发展

B．压缩

C．适度发展

D．停止发展

答案

参考答案：C

解析：[考核要点] 本题考核的是第八章第三节电力工业发展规划。[解题思路] 积极发展水电、坑口大机组火电、压缩小火电、适度发展核电、鼓励热电联产和综合利用发电，是我国电力建设的方针。

单项选择题

在多年冻土地区修建路堤时，下列不符合保护多年冻土的原则的是( )。

A．堤底采用较大石块填筑

B．加强地面排水

C．设置保温护道

D．保护两侧植被
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单项选择题 共用题干题

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. Another responsibility of a transport layer protocol is to create a  (2) and error-control mechanism at the transport level. TCP uses a sliding (3) protocol to achieve flow control. It uses the acknowledgment packet, time-out, and retransmission to achieve  (4) control. The transport layer is also responsible for providing a connection mechanism for the application program. The application program sends  (5) of data to the transport layer. It is the responsibility of the transport layer at the sending station to make a connection with the receiver.

空白（4）处应选择（）

A.packet

B.time

C.error

D.phase
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