首页
登录
职称英语
[audioFiles]audio_ezf_m_0378(20102)[/audioFiles] A Ne
[audioFiles]audio_ezf_m_0378(20102)[/audioFiles] A Ne
游客
2023-11-20
63
管理
问题
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/3204874.html
相关试题推荐
[audioFiles]audio_ezftlmnj_0013(20101)[/audioFiles]
[audioFiles]audio_ezftlmnj_0061(20101)[/audioFiles]
[audioFiles]audio_ezf_m_0275(20101)[/audioFiles]Lighttravelsataspeedw
[audioFiles]audio_ezf_m_0227(20101)[/audioFiles]
[audioFiles]audio_ezf_m_0440(20101)[/audioFiles]Inadditiontoage,/gende
[audioFiles]audio_ezf_m_0063(20101)[/audioFiles]
[audioFiles]audio_ezf_m_0134(20101)[/audioFiles]Thereligionofaboutone
[audioFiles]audio_ezf_m_0113(20101)[/audioFiles]Theweatherconcernsevery
[audioFiles]audio_ezf_m_0286(20101)[/audioFiles]IamthankfultotheAmerica
[audioFiles]audio_ezf_m_0464(20101)[/audioFiles]ArtificialIntelligencei
随机试题
The(clothesyou)weardonotserveonlya(pure)practicalfunction.Theyspeak
Weenjoy(work)______withhimbecausehehasagoodsenseofhumour.working句意
TinyCameraClippedonYourShirtA)I’vebeensnappingphot
______theflood,theshipwouldhavereacheditsdestinationontime.A、Incaseo
甲审计人员在审计A公司2014年度财务报表时发现,2014年12月31日原材料—
怀疑肠套叠作诊断性空气灌肠时,注气压力宜选用A.10.6kPA.B.13.3kP
脑死亡发生于A.临终期 B.濒死前期 C.濒死期 D.临床死亡期 E.生
小刚期中考试不理想,父母答应如果期末考试能考好,就给他买电脑,于是小刚刻苦地学习
期货公司应当提示客户可以通过(),查询期货交易结算结果和有关期货交易的其他信息
位于A市A区的甲加工厂和新加坡乙贸易公司签订了一份加工合同,由甲方为乙方加工制作
最新回复
(
0
)