单选题why do some stations keep silence?（）ABecause they are not engaged in the distress trafficBthey will affect the transmission of the distress trafficCThe powers of these stations are very weakDThey are not in charge of search and rescue
单选题
why do some stations keep silence?（）
A
Because they are not engaged in the distress traffic
B
they will affect the transmission of the distress traffic
C
The powers of these stations are very weak
D
They are not in charge of search and rescue
参考解析
解析：
暂无解析
相关考题：
You have failed several times. Why not ________ some other way?(A) try doing it(B) to try to do it(C) that you try it(D) having tried
Mary: What are you working on? Susan: I'm doing some embroidery. Mary: ______ Susan: I don't do very much, just for very special occasions.A．I didn't know you did needlework.B．I think you have done a good job.C．Where did you learn to do needlework?D．Why do you do needlework?
Why must local government keep his or her doors to every visitor ?() A.Economic development depends on it.B.The central government forces them to do that.C.In order to let more people enjoy the beauty of the sites.D.They are friendly and hospitable.
What are they?()? It’s a secret. But I’ll give you some hints, anyway.A、Is it a secretB、Can I have an idea about themC、Why do you keep it a secret
Why do some people support cloning?() A.It can help those infertile couplesB.It may revolutionize organ transplantationC.It could save seriously endangered speciesD.It may solve the problem of starvation
Why do some people oppose cloning?() A.It is not perfectB.It is against our traditional ethics and moralityC.It is against the natural lawD.It may devaluate real life
Why do hoatzins collect together in smaller groups when the rainy season comes?A．To find more food.B．To protect themselves better.C．To keep themselves warm.D．To produce their young.
29． Why do people like teleshopping?A． Because they like watching TV．B． Because they can do some shopping at home，C． Because they like the heavy traffic．D． Because they think the things on TV are good．
Why do some people choose self-catering accommodation? __________A.To experience a warmer family atmosphereB.To enrich their knowledge of EnglishC.To entertain friends as they likeD.To enjoy much more freedom
Why do researchers estimate elephant numbers in an area by counting dung piles?A Because elephants are difficult to catch.B Because it is not possible to count elephants from a plane.C Because it is not possible to keep track of elephants.D Because elephants are shy animals.
我经常在艏楼做一些修理工作。（）A、I usually keep watch on the bridge.B、I often do some repair work on the forecastle.C、I often paint on deck.D、I often do some repair work on the bridge.
Why are base stations sometimes cascade connected? （）A、To save antennasB、To share PCM linksC、To share RBS equipmentD、To simplify the installationE、To be able to reuse frequencies
单选题Why did some African Americans accept the white standards of beauty?ABecause they tried to keep socially fashionable.BBecause they did not have their own standards of beauty.CBecause they were not well educated as white Americans.DBecause they wanted to become part of the mainstream.
单选题Why do some people get sick after drinking the water from the river?ABecause the river is pollutedBBecause the river makes the earth more beautifulCBecause the river can only offer water to animalsDBecause there are too many animals and plants in the river
问答题◆Topic 10: Government’s Control of Violence in Media Questions for Reference: 1. What negative effects could be brought by the violence in films and on television to our society according to your observation? 2. Do you agree that the government’s control of the amount of violence in films and on television would limit our right of free speech? Why /Why not? 3. Some people put that it is in our best interest as a society for the government to censor broadcast media for violence. Do you think so? Why /Why not?
单选题Why do companies adopt just-in-time inventory system?AThey try to keep their inventory of spare parts as low as possible.BThey can save lots of money.CIt’ s a more efficient method of operating.DA, B and C.
单选题Why do some companies design their business cards in full color?ATo keep up with the trend.BTo make the cards look fancy.CTo distinguish themselves from others.DTo vividly demonstrate the corporate culture.
单选题水手长，我们为什么要开舱盖?（）ABosun, why do we open hatch covers?BOfficer, why do we open hatch covers?CBosun, why do we close hatch covers?DBosun, why do we open hatches?
单选题What are they ， ， . -- It’s a secret. But I’11 give you some hints， anyway.（）AIs it a secretBCan I have an idea about themCWhy do you keep it a secret
问答题Q7: Do you think it will become increasingly common for companies to relocate some activities to other countries? (Why?/Why not?)
问答题Some people believe that a college or university education should be available to all students. Others believe that higher education should be available only to good students. Which view do you agree with and why?
单选题The ARQ mode should be applied（）.Awhen two stations communicate with each otherBin any radio system and at any timeCwhen one ship sends a message to another stationDfor communication among some stations
单选题Why do some frogs change the pitch of its calls?ATo be different from others.BTo attract a female frog.CTo tend out messages.DTo go against traffic noises.