ThescientistsfromtheLockheedSpaceCompanyworkinFelton...
问题详情:
The scientists from the Lockheed Space Company work in Felton, California, with the help of a computer. But the computer is placed in Sunnyside, about 80 kilometers away. What the scientists input is sent by telephone lines to the computer, and after a time, copies of the designs (设计)are needed back in Felton as quickly as possible. Lockheed people tried several ways of sending the prints(印刷品), but the most effective seems to be by pigeon(鸽子) pigeons really used to carry messages in these days? They are ,and they send the prints faster and cheaper than any other way.
Human messengers (persons carrying messages) are much more expensive and slower than the pigeons. The road to Felton goes through the mountains, and the driving is not easy. An electronic printout system(电子印刷系统)could do the work in Felton, but at a cost of 10 dollars a print. Pigeons carry the designs for about 1 dollar each.
Now Lockheed people have ten pigeon pigeons do the work, and they have made Lockheed more famous. You can often read the news about the pigeons in the newspapers around the world.
1. The story is mainly about .
A. Felton ,California B. the scientists
C. how to work with computers D. sending prints by pigeon
2. This story is unusual because pigeons .
A. don’t like carrying things
B. are often expensive to keep
C. seem out of place in the space age
D. aren’t friendly to the scientists
3. Something that’s effective(有效的) .
A. usually costs more B. is something that works
C. is often unhappy D. is often done by animals
4. Which happened first?
A. Pigeons were used as messengers.
B. Human messengers were used.
C. What the scientists input was sent to the computer.
D. Scientists got their designs.
5. Lockheed likes the pigeons because they .
A. do the work at low cost B. get their pictures on television
C. understand the computer D. make the scientists pleased
【回答】
1D 2C 3B 4B 5A
知识点:日常生活类
题型:阅读理解
-
在探究“光对鼠妇生活的影响”实验中属于变量的是( )A.温度 B.湿度 ...
问题详情:在探究“光对鼠妇生活的影响”实验中属于变量的是( )A.温度 B.湿度 C.光照 D.土壤【回答】C知识点:生物圈是最大的生态系统题型:选择题...
-
下列反应的离子方程式正确的是( )A.在碳**镁溶液中加入足量Ca(OH)2溶液:Mg2++2HCO3-+C...
问题详情:下列反应的离子方程式正确的是( )A.在碳**镁溶液中加入足量Ca(OH)2溶液:Mg2++2HCO3-+Ca2++2OH-=MgCO3↓+CaCO3↓+2H2OB.电解饱和食盐水:C.过量的铁与浓**反应: Fe+6H++3NO3-=Fe3+十3NO2↑+3H2OD.向硫*铝铵[NH4Al(SO4)2]溶液中滴加足量Ba(OH)2溶液 NH4++Al...
-
在恒温、体积为2L的密闭容器中进行反应:2A(g)⇌3B(g)+C(g),若反应物在前20sA物质由3mol降...
问题详情:在恒温、体积为2L的密闭容器中进行反应:2A(g)⇌3B(g)+C(g),若反应物在前20sA物质由3mol降为1.8mol,则前20s的平均反应速度为()A.v(B)=0.03mol/(L•s)B.v(B)=0.045mol/(L•s)C.v(C)=0.03mol/(L•s)D.v(C)=0.06mol/(L•s)【回答】考点:化学反应速率和化学计量数的关系.专题:化学反应速率专...
-
光明在低头的一瞬 ...
问题详情: 光明在低头的一瞬 迟子建 ...
相关文章
- Socialnetworkingisn’tonlyfortheunder40s.Morethan25perce...
- EveryoneknowsEnglishisoneofthemostimportantsubjectsi...
- I’msittinghereinthiscoffeeshop.YouknowtheonetherebyAlle...
- ScienceexpertsthinkthesuccessoftheG20mostlydependson
- Ifoverweightpeopleeatlessandtakemoreexercise,they’llso...
- —Excuseme,where’sthepostoffice,please?—Sorry,Idon’tkno...
- Forthosewhostudythedevelopmentofintelligence(智力)inthean...
- It'sinterestingtoseehowpeoplemakeuseofthetimetheyspendo...
- Withthedevelopmentofscienceandtechnology,robotcooks
- TimeforKids(TFK) getsthegreatnewsonthecoolesttoysfor201...