首页
登录
职称英语
[originaltext] A New Need for Traffic Lights
[originaltext] A New Need for Traffic Lights
游客
2023-11-23
102
管理
问题
A New Need for Traffic Lights
Space is getting crowded. That’s the latest worry for many scientists. About ten thousand objects are orbiting our planet now. Some are satellites that have a job to do. Other items have finished their work. Parts of rockets may have been discarded during a flight and left behind in space.
This is becoming a real problem. More items in space lead to more danger. Some of the objects now floating through space are just a few inches in size. But they can still do harm. If they hit a spacecraft or spacelab, they might destroy it.
Space agencies can now locate objects in space with a computer. Yet, accidents still happen. Someone may see that two objects seem to be very close. But they have no power to prevent the crash. Experts can only plot courses to help future rockets avoid some of the objects.
选项
答案
A New Need for Traffic Lights
Space is getting crowded. That’s the latest worry for many scientists. About ten thousand objects are orbiting our planet now. Some are satellites that have a job to do. Other items have finished their work. Parts of rockets may have been discarded during a flight and left behind in space.
This is becoming a real problem. More items in space lead to more danger. Some of the objects now floating through space are just a few inches in size. But they can still do harm. If they hit a spacecraft or spacelab, they might destroy it.
Space agencies can now locate objects in space with a computer. Yet, accidents still happen. Someone may see that two objects seem to be very close. But they have no power to prevent the crash. Experts can only plot courses to help future rockets avoid some of the objects.
解析
转载请注明原文地址:http://tihaiku.com/zcyy/3213192.html
相关试题推荐
Howmanyattacksandclasheswerereportedinthisnews?[br][originaltext]
Howmanyattacksandclasheswerereportedinthisnews?[br][originaltext]
Accordingtothecourtruling,Israelhasto[br][originaltext]TheInterna
Wheredoesthisconversationmostlikelytakeplace?[br][originaltext]M:Hell
Whatisthemaintopicofthisconversation?[originaltext]M:Weseemtobehavi
______werereportedbytheweatherstationinChicago.[br][originaltext]
______werereportedbytheweatherstationinChicago.[br][originaltext]
______werereportedbytheweatherstationinChicago.[br][originaltext]
Howmanycarsaretowedfromthestreetseachyear?[br][originaltext]One
Howmanycarsaretowedfromthestreetseachyear?[originaltext]Oneofth
随机试题
Islanguage,likefood,abasichumanneedwithoutwhichachildatacritica
A、Stupid.B、Friendly.C、Terrible.D、Considerate.A
[originaltext]Thediamondisconsideredthemostfamousandvaluablejewel
保持香港、澳门长期繁荣稳定,必须全面准确贯彻____的方针。A.“一国两制”
A.-1 B.1 C.4 D.-1或4
以下一般不属于监理合同主要内容的是(43)。A.业务需求 B.监理费用 C.
与甲状舌管囊肿发病有关的是:()A.甲状腺异位 B.甲状舌管感染 C.舌
______是最初级的注意。
小比例尺地图缩编时,根据居民地的人口数或行政等级来确定居民地取舍的方法是()。A
模仿法的基本操作程序中最重要的步骤是()。(2009-11)A:选择合适场地B
最新回复
(
0
)