66.One of the NASA’s major concerns about astronauts is _____.
A. how much exercise they do on the station
B. how they can remain healthy for long in space
C. whether they can recover after returning home
D. whether they are able to go back to the station
2.【2015·北京卷】C
Life in the Clear
Transparent animals let light pass through their bodies the same way light passes through a window. These animals typically live between the surface of the ocean and a depth of about 3,300 feet—as far as most light can reach. Most of them are extremely delicate and can be damaged by a simple touch. Sonke Johnsen, a scientist in biology, says, “These animals live through their life alone. They never touch anything unless they’re eating it, or unless something is eating them.”
And they are as clear as glass. How does an animal become see-through? It’s trickier than you might think.
The objects around you are visible because they interact with light. Light typically travels in a straight line. But some materials slow and scatter(散射) light, bouncing it away from its original path. Others absorb light, stopping it dead in its tracks. Both scattering and absorption make an object look different from other objects around it, so you can see it easily.
But a transparent object doesn’t absorb or scatter light, at least not very much, Light can pass through it without bending or stopping. That means a transparent object doesn’t look very different from the surrounding air or water. You don’t see it ----you see the things behind it.
【五年高考(2011-2015)英语试题分项精解:专题23 阅读理解之科普知识类(原卷版)】相关文章:
★ 2017届高考英语二轮复习大题冲关秘籍阅读理解七选五:名校模拟(含解析)
★ 【三维设计】2017届高考英语(江苏专用)二轮复习阅读理解解题技法示范课件:3
★ 2017届高考英语二轮复习大题冲关秘籍完形填空之夹叙夹议文:名校模拟(含解析)
★ 江苏省扬州市2014高考英语一轮 阅读理解暑假练习题(10)
★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ题型重组训练:第10组(含解析)
★ 浙江省湖州市2014高考英语阅读理解一轮(暑假)精炼(20)含答案
★ 湖南省长沙县实验中学2016届高三英语二轮复习书面表达复习重点话题指导专题21 语言学习话题指导(学生版)
★ 重庆市2014高考英语阅读理解一轮(精品)训练题(1)附答案
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21