网友您好, 请在下方输入框内输入要搜索的题目:

题目内容 (请给出正确答案)
单选题
Geostationary satellites are the artificial satellites which().
A

always move slowly

B

are in one place only

C

sometime move sometime don‟t move

D

are synchronizing with the movement of the earth


参考答案

参考解析
解析: 暂无解析
更多 “单选题Geostationary satellites are the artificial satellites which().A always move slowlyB are in one place onlyC sometime move sometime don‟t moveD are synchronizing with the movement of the earth” 相关考题
考题 Now satellites are 36 to forecast(预报)the weather. They are in space, and they can 37 any part of the world. The satellites take pictures of the atmosphere(大气),38 this is where the weather forms(形成). They send these 39 to the weather stations. So meteorologists(气象学家)can see the weather of any part of the world. From the pictures, the scientists can often say 40 the weather will change.Today, nearly five hundred weather stations in sixty countries receive satellite pictures. When they receive new pictures, the meteorologists compare them with earlier 41 . Perhaps they may find that the clouds have changed during the last few hours. This may mean that the 42 on the ground may soon change, too. In their next weather forecast, the meteorologists can say this.So the weather satellites are a great 43 to the meteorologists. 44 __satellites were invented, the scientists could forecast the weather for about 24 or 48 hours. Now they can make good forecasts for three or five days. Soon, perhaps, they may 45 forecast the weather for a week or more ahead(提前).36.________________A. help B. to help C. helped D. helping

考题 _________A. satellites B. pictures C. weather D. space

考题 根据下列材料请回答 31~35 题:ANow satellites are helping to forecast the weather.They are in space,and they can reach any part of the world.The satellites take pictures of the atmosphere(大气),because this is where the weather form.They send these pictures to the weather stations.So meteorologists(气象学家)can see the weather of any part of the world.From the pictures,the scientists can often say how the weather will change.Today,nearly five hundred weather stations in sixty countries receive satellite pictures.When they receive new pictures,the meteorologists compare them with earlier ones.Perhaps they may find that the clouds have changed during the last few hours.This may mean that the weather on the ground may soon change,too.In their next weather forecast,the meteorologists can say this.So the weather satellites are a great help to the meteorologists.Before satellites were invented,the scientists could forecast the weather for about 24 0r 48 hours.Now they can make good forecasts for three or five days.Soon,perhaps,they may be able to forecast the weather for a week or more ahead.第 31 题 Satellites travel______.A.in spaceB.in the atmosphereC.above the groundD.above space

考题 Why do we use the weather satellites to take pictures of the atmosphere?Because______.A.the weather satellites can do it easilyB.clouds form. thereC.the weather forms thereD.the pictures can forecast the weather

考题 The main idea of this passage is that satellites aye now used in______.A.taking pictures of the atmosphereB.receiving pictures of the atmosphereC.doing other work in many waysD.weather forecasting

考题 Satellites were launched()low orbit for weather and military applications.A.on B.around C.in D.with

考题 Which statement concerning GPS is TRUE ________.A.It cannot be used in all parts of the worldB.There are 12 functioning GPS satellites at presentC.It may be suspended without warningD.Two position lines are used to give a 2D fix

考题 The Moon and most artificial satellites travel around the Earth in elliptical paths.A: waves B: orbits C: voyages D: flights

考题 只含蛋白质而不含核酸的的病毒称()A、类病毒(Viroids)B、卫星(Satellites)C、类病毒(viroid)D、朊病毒(Prions)E、拟病毒(virusoid)

考题 只含小分子量RNA而不含蛋白质的病毒称()A、类病毒(Viroids)B、卫星(Satellites)C、类病毒(viroid)D、朊病毒(Prions)E、拟病毒(virusoid)

考题 Satellites were launched () low orbit for weather and military applications.A、onB、aroundC、inD、with

考题 Which of the following is a diplexer used for?()A、Allows two satellite tuners to use the same dish.B、Connects the low noise block down converter (LNB) to the multi-switch.C、Combines satellite and over the air (OTA) signals.D、Allows one LNB to use two satellites.

考题 单选题()is a space system using one or more artificial earth satellites.A Satellite networkB Satellite linkC GMDSSD Satellite system

考题 单选题只含小分子量RNA而不含蛋白质的病毒称()A 类病毒(Viroids)B 卫星(Satellites)C 类病毒(viroid)D 朊病毒(Prions)E 拟病毒(virusoid)

考题 单选题CATEGORY A EPIRB’s transmit on frequencies that are monitored by().A orbiting satellites in spaceB commercial radio stationsC private,commercial,and military aircraftD ordinary radio stations

考题 单选题Geostationary satellite are artificial satellite which().A always move slowlyB are in one place onlyC sometimes move and sometime don‟tD synchronize with the movement of the earth

考题 单选题The receiver uses()satellites to compute latitude,longitude,altitude,and velocity.A oneB twoC threeD four

考题 单选题The satellites over the major ocean regions cover the globe().A besides the polar regionsB including the North Pole and the South PoleC above 70°N and below 70°SD as for north and south as 70°

考题 单选题()process the distress signal from EPIRB to determine its position and identity.A COSPAS-SARSATB Ground receiving stationsC storing distress signalD Near-polar orbiting satellites

考题 单选题Any ship with SES can()and()through the Inmarsat satellites when sending a distress alert.A enter the system rapidly / wait for rescueB have an absolute priority to enter the system / contact with a CESC establish contact with the RCC / enter the portD enter the system gradually / get the rescue

考题 单选题What’s the advantage when using the satellites?()A The message can be directed to the desired locationB The message can follow the earth’s curvatureC The quality of message can not be affected by climaticD The range of the message extend and the quality of reception is improved

考题 单选题The satellites over the major ocean regions cover the globe().A besides the polar regionsB including the North Pole and the South PoleC above 70N and below 70SD as far north and south 70

考题 单选题There are()operational satellites in the INMARSAT system covering the whole globe except the polar regions.A 3B 4C 8D 12

考题 单选题()process the distress signal from EPIRB to determine its position and identity.A COSPAS-SARSATB ground receiving stationsC storing distress signalD Near polar orbiting satellites

考题 单选题The advantage of geostationary satellites is().A the range of antenna can cover everywhere in the worldB we can know the ship’s exact positionC that the distress alert can be located as soon as possibleD antenna of permanent earth stations may be directed towards fixed points in the sky

考题 单选题Which statement about satellite navigation is TRUE? ()A While a fix can be generated by signals received from two satellites,three satellites are necessary for reliable accuracyB The satellites are in equatorial orbits around the earth about 60°of longitude apartC The satellite navigation system determines a fix by measuring the doppler shift of the radio signals from the satelliteD The ship's receiver cannot begin processing data until the antenna locks onto the satellite and starts continuous tracking

考题 单选题Which statement concerning GPS is TRUE().A It cannot be used in all parts of the worldB There are 12 functioning GPS satellites at presentC It may be suspended without warningD Two position lines are used to give a 2D fix