1.在一些早期尝试使用大气球（回声我和回声II）作为通信信号的无源反射器和一些小实验 卫星发射，第一个真正的通讯卫星，通讯卫星I和II，在七月会推出1963 1962dan。
2.说明如何快速技术在移动，QPSX技术的时候，常用的载体有综合服务数字网络技术背后。
3.这个基本服务允许计算机交换消息，这样做使得任何应用程序都可以通过计算机之间的消息交换实现.。
4.在发射机接口部件接受由数据处理器的运行速度确定的数据存储的数据是暂时的，并且再生它的速度与接收数据处理器的数据兼容。
5.提供转换设备或调制器的发送部分的输入的数据机，可以是键盘、打印机、读卡器、纸带终端、计算机或磁带终端。
6.据报道，新的传输和均衡技术将允许数字数据传输在电话通道速度PF 4800位每秒或更高。
7.导体的电流方向通常被认为是从正到负，虽然电子做相反的方向移动。
8.In the aircraft landing system, the input signal is the relative position of the aircraft and the runway, the system is the aircraft, and the output signal is the aircraft relative to the lateral position of the runway correction.
9.A full duplex data transmission system includes a data processing device originating from the originator and an interface component comprising a buffer and a control unit.
10.Optical fiber is likely to be used first in some dedicated circuits such as transmission data or television, and then experimentally laid over the telephone network in the late 1970s.
11.If there is a signal in the frequency range higher than half of the sampling rate, the spectrum of the sampled signal will produce distortion.
12.Although we can not quantitatively evaluate the reliability of software, we can use the nature of the project to form a method for evaluating the cost of reliability and bit guarantee reliability.
三．
1.Light travels in waves, ripples as the pond, from one peak to another peak distance called wavelength, ordinary white light by many different wavelengths of light, and its wave to each direction of propagation. However, the laser has only one wavelength and all the waves want to move in one direction. They stay in a straight narrow beam of white light, rather than as communication, which is why the light from the laser so strong reason.\
2.Five industrial cities next to the great lakes will be discharged directly into the lake without waste treatment, and these wastes have a lot of nutrients in water organisms. Because of
excessive absorption of nutrients in aquatic plants, breeding flood, so that fish in the water due to lack of oxygen and suffocation. Five lakes are disappearing due to the deterioration of the ecological environment, water pollution, water species are less and less.
四．
在AI的发现和发展的指导下，由一系列不变的编辑目标约束，手册已发展到1500页，分为三卷.。在卷的章节的分布反映了在一定程度上，最近的AI历史。第一卷，我们讨论了搜索，知识表示，理解自然语言，理解口语。这些都是最热门的领域时，第一卷起草。我们推迟讨论“过渡地区”到后来的卷。例如，自动扣除是不是一个受欢迎的主题AI研究当卷我计划，我们离开它，直到这个卷。在此期间，它已经看到了一些新的发展，并取得了一些突出的它在早期的AI。同样，为了反映更多最近的观点，第二卷的两章在去年完成.。第II卷的其他章节，涉及科学、医学、人工智能教育应用，起草前。本章在本书处理的主题，我们没有很好的理解当手册计划，推迟这些讨论中，我们有机会“等等看”的眼光，究竟发生了什么，学习，规划，并自动扣除，我们也推迟了机器人一章本书但最终决定。对于后来讨论的原因，不要写它。
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