星际小队 space crew（Astronauts inAmericawho fly into space need special training. First they go to Houst

• 1、Astronauts inAmericawho fly into space need special training. First they go to Houston Texas. That is the home of the Johnson Space Center. There they are tested to see how strong and smart they are.   The first test is for the heart. The peo
• 2、2019超级碗开幕，NASA发布了哪些有趣的主题推文
• 3、The Starship Enterprise returns from warp drive to ordinary space with a forward speed of 53km/s.To the crew's great surprise,a Klingon ship is 140km directly ahead,traveling in the same direction at a mere 20km/s.Without evasive action,the Enterpris
• 4、有哪些小众，但是却很好听的英文歌
• 5、老师，名词所有格我不是很明白

1、Astronauts inAmericawho fly into space need special training. First they go to Houston Texas. That is the home of the Johnson Space Center. There they are tested to see how strong and smart they are.   The first test is for the heart. The peo

1. D细节理解题。由题目中的关键词the doctors test first 可回原文定位于第二段。根据第二段第一句"The first test is for the heart."可知，对宇航员的身体检查第一项就是对心脏功能的检查。 2. D 细节理解题。...

2、2019超级碗开幕，NASA发布了哪些有趣的主题推文

被誉为“美国春晚”的 2019 超级碗赛事，已经正式拉开序幕。无论地区远近，大家都在热议与球相关的话题，即便是立足于太空的美国宇航局（NASA）也不例外。

继在 Twitter 上分享了一张由国际空间站宇航员拍摄的“太空橄榄球”照片之后，网友们甚至计算了更多航天器接收超级碗直播信号所需的延时。

太空橄榄球

国际空间站的大小，与橄榄球场的面积大致相当。

赛场的纵深，相当于 17 套詹姆斯韦伯太空望远镜的镜组。

有趣的是，退役宇航员（双胞胎）Scott Kelly 和 Mark Kelly，也出现在了亚马逊 Alexa 的超级碗广告中。

借此就会，NASA 不忘强行科普一下微重力的知识。

视频...

【It orbits Earth with a crew living and conducting science in microgravity】

向爱国者队献上一颗超新星

为公羊队呈上一片星云

约翰逊航天中心：如何制作“太空干酪”（Space Queso）

视频...

【we've got your queso ingredients right here】

我们了解到，你可以将 4625 个橄榄球，装入 NASA 的猎户座（Orion）载货舱。

3、The Starship Enterprise returns from warp drive to ordinary space with a forward speed of 53km/s.To the crew's great surprise,a Klingon ship is 140km directly ahead,traveling in the same direction at a mere 20km/s.Without evasive action,the Enterpris

Enterprise's speed is V1=53km/s
Klingon's speed is V2=20km/s
let's suppose Enterprise's acceleration ：a=?km/s^2
suppose accelere time：t=?s
an Uniformly retarded rectilinear motion
→with Enterprise S1=V0t 1/2at^2=53*t 1/2at^2 ①
→with Klingon S2=Vt=20*t②
to barely avoid a collision
→S1=S2 140KM③
solve①,②and③
a≈-3.8893km/s^2
Anather way
if Enterprise can reduce the speed to 20km/s in the 140km,it can barely avoid a collision!
so this question became → S=1/2at^2
use average speed → V=[0 （53-20）]/2=16.5km/s
so S=V(average speed)*t → t=140/16.5
so acceleration a=△V/t=(-33)/(140/16.5)=-3.8893

4、有哪些小众，但是却很好听的英文歌

（smoking gun）这是一首小众却别有味道的英文歌，只听旋律会有一种感觉，听完旋律再细品一下歌词的含义却是另一番天地

5、老师，名词所有格我不是很明白

老师，名词所有格我不是很明白