电子通信专业英语 课后习题答案 (选择题加翻译题) 李霞、王娟主编

本文当前边为选择题的答案，后边为翻译题的答案

选择题

一单元、

1.Mathematical modelling and(a developments in computer)

2.For an engineering (d the main objective)

3.Which one of the (c the exercises are only)

4.Which is not the (b geometry)

5.(a Fourier series) is vital to

二单元．

1.The theoretical foundation (c the theory of probability)

2.For engineering students (c interpretation)

3.Find which is not (b the number of bits used to )

4.In general, the behavior of (d probability density function)

5.Random variables with (c from uniformly distributed)

三单元．

1.An ideal operational amplifier has (a infinite gain, infinite bandwidth, infinite input)

2.One of the summing (b no current flows into )

3.For an inverting amplifier (a the output voltage)

4.Which is not true (a it is of no use)

5.For a voltage follower (c it has unity gain)

四．

1.A continuous signal (a an analog signal)

2.A system is called (c additivity and homogeneity)

3.The unit impulse signal (b the differential of)

4.Which of the following statements best (b it is a linear)

5.Any signal can be (the sum of a series of shifted and scaled unit impulse function) 五、

1、the beginning of (d.maxwell’s equations)

2、(b.george southword and )show experimentally

3、basic cicuit theory(c.lower frequency)

4、advantage to using RF/microwaves (e a high-speed)

5、RF/microwaves (c.modulating )

6、microwaves clothes dryers are designed (resonance of conductive)

六.

1.By using the (b -5.25)

2.The first step (c sample it at discrete_

3.The following descriptions about (b the study of )

4.Regarding the advantages (a the transmission)

5.The application areas(b eognitive science)

七.

1.According to the author (b image processing are )

2.A logic place (a recognition of)

3.(b image enhancement) is one of

4.Image restoration is (c image restoration is basically)

5.In the context (c involves extracting)

6.According to the text (a is very complex)

十一．

1.The function of a (b to allow users)

2.Which of the following about layering (b the input module)

3.The source (c convert the input)

4.The analog signal waveform (d all of above)

5.The purpose of (c to place signal)

6.In 2-PAM (d +-1)

7.When the receiving (b strips off the DLC header and trailer)

十二、

1.In order to form (b seven)

2.The first commercially (b TDMA)

3.In a CDMA (c special code)

4.The spreading factor(a the transmission)

5.Which of the following statement about RAKE(c RAKE's)

6.In the uplink (b it can ensure)

7.Spread-spectrum （d transform original)

8.When the network(d move some users to other less)

十三．

1.The ideal,originated with (c didn't have)

2.(a infrared) light is chosen

3.The distinguishing characteristic (d use different wavelengths in different bands)

4.Which one of the (d no IPR)

5.Which sentence is(c a receiver needs)

十四．

1.Internet was originally (b a small group)

2.TCP/IP model (c layer 5 and layer 6)

3.(c network) layer transfers

4.HTTP is used to (b transfer Web)

5.TCP, as an (d all of above)

十五．

1.The component that is (b IPTVCD)

2.In the digital (c transmitting only)

3.A television gate (d all of above)

4.The media gateway (d end users)

5.The function of IP(b transfer the television)

6.When sending the same (c multicast)

7.For unicast transmission(c 20 Mbps)

Unit 1

3(1）The calculus微积分在解析几何的帮助下，被证明能够有效的解决许多早先无法解决的问题。