【单选题】【消耗次数：1】
奈氏准则给出了避免码间串扰，每赫兹带宽在每秒种传输的码元个数不能超过（）
①
1个
②
2个
③
3个
④
4个
参考答案：
复制
纠错
相关题目
【单选题】
信道被分成若于个子频带，一个子频带传输一个信号，为防止串扰在信号间设置保护频带，这称信号分割技术为（）
①
时分多路复用
②
频分多路复用
③
统计时分多路复用
④
波分多路复用
【填空题】
在mRNA上每3个相邻的核苷酸组成一个[填空(1)]，编码[填空(2)]，称为遗传密码
随机题目
【简答题】
Translate the following sentence into English.乍一看这是一道难题。
【简答题】
Direction: Fill in the blanks with thephrases given below. Change the form if necessary.[set off; after all; attach to; burst into laughter; lean against; teach...a lesson; take off; come to sense; give in to]3. When I say to[填空1]in military language, you know what that means!
【简答题】
Direction: Fill in the blanks with the words given below. Change the form if necessary.[chore; talent; crowded; earnings; finance; festive; memorable; sacrifice; smash; reproduction]2. A[填空1]is a copy of something such as a piece of furniture or a work of art.
【简答题】
Directions: Fill in the blanks with the words given below. Change the form if necessary.(pros and cons; allocation; update; complexity; infancy; initially; minimal;strategically; grab; digest)4. Do you have the[填空1]yet?
【简答题】
Direction: Fill in the blanks with the phrases given below. Change the form if necessary.[collide with; take hold of; for a moment; head for; ever since; be full of; share with; make fun of]1. Ann had lived in a cottage[填空1]she was born, and had no wish to move to a tower block.
【简答题】
Direction: Fill in the blanks with the phrases given below. Change the form if necessary.[sell out; in other words; consist of; stand for; rely on; demand for; engage in; at hand; yield to; confront with]1. They have[填空1]of the brand that I like.
【简答题】
Directions: Translate sentence by using “nothing more than”.4. We ______________(意思只不过是说). This is the usual condition of things on our earth.
【简答题】
Translate the following sentence into English.这是一次重要的会议，请务必不要迟到。
【简答题】
Translate the following sentence into English.老师要求她这个学期要投入到学习之中。
【简答题】
Direction: Fill in the blanks with the phrases given below. Change the form if necessary.[have access to; go off; desperate for; put up with; always the case; give advice; concentrate on; arrive at; make an effort; come in handy]1. We may[填空1], but we cant give conduct.