永发信息网

(一)ImageMartianDustParticle根据以下材料,回答问题。NASA'sPhoenixMarsLanderhastakeni

答案:2  悬赏:0  手机版
解决时间 2021-02-15 05:28
  • 提问者网友:听门外雪花风
  • 2021-02-14 10:42
共享题干题 (一)Image Martian Dust Particle根据以下材料,回答问题。 NASA's Phoenix Mars Lander has taken its first-ever picture of a single particle of rusty Martian dust with one of its microscopes. The dust particles of dust were shown at a higher magnification than anything outside of Earth that has been imaged before. The rounded particle measured only about one micrometer, or one millionth of a meter, across. "Taking this image required the highest resolution microscope operated off Earth and a specially designed device to hold the Martian dust," said Tom Pike, a Phoenix science team member from Imperial College London. "We always knew it was going to be technically very challenging to image particles this small." The device that imaged the dust speck is called an atomic force microscope, which maps the shape of particles in three dimensions by scanning them with a sharp tip at the end of a spring. The atomic force microscope can detail the shapes of particles as small as about 100 nanometers. And this won't be the last dust particle that Phoenix will image. "After this first success, we're now working on building up a portrait gallery of the dust on Mars," Pike said. Dust exists everywhere on Mars, coating the surface and giving it its rusty red color. Dust particles also color the Martian sky pink and feed storms that regularly envelope the planet. The ultra-fine dust is the medium that actively links gases in the Martian atmosphere to processes in Martian soil, so it is critically important to understanding Mars' environment, the researchers said. The $420-million Phoenix mission is analyzing the dust and subsurface ice layers of Mars' arctic regions to look for signs of potential past habitability. The particle seen in the atomic force microscope image was part of a sample scooped by the robotic arm from the "Snow White" trench and delivered to Phoenix's microscope station in early July.1.[不定向选择题]Using the same technology, we have also measured the size of particles on the Moon and Jupiter.A.Right B.Wrong C.Not mentionedABC确定 2.[不定向选择题]An electronic device has been developed to measure the weight of certain Martian particles.A.Right B.Wrong C.Not mentionedABC确定
最佳答案
  • 五星知识达人网友:杯酒困英雄
  • 2021-02-14 12:17
1.参考答案:C
参考解析:题干:使用同样的技术,我们也能测量月球和水星上的微粒大小。通篇文章都没有提到科学家用同样的技术测量月球和水星上的微粒。故本题选“未提及”。
2.参考答案:C
参考解析:题干:已经开发出了一种电子设备,用以测量某种火星微粒的重量。通篇文章都没有提到有人发明了一种能测量火星上某些微粒重量的电子装置。因此本题选择“未提及”。3.[不定向选择题]After collecting the last Martian dust particle, the scientists have started to build up a portrait gallery of it.A.Right B.Wrong C.Not mentionedABC确定
全部回答
  • 1楼网友:duile
  • 2021-02-14 13:54
这个问题的回答的对
我要举报
如以上回答内容为低俗、色情、不良、暴力、侵权、涉及违法等信息,可以点下面链接进行举报!
点此我要举报以上问答信息
大家都在看
推荐资讯