Small But Wise
Im very excited because were going to be seeing parts of the universe that we havent seen before, said Ned Wright, a scientist who directs the WISE project.
The pictures taken by WISE wont be like everyday digital photographs, however. WISE stands for Wide-field Infrared Survey Explorer. As its name suggests, the WISE camera takes pictures of features that give off infrared radiation.
Waves of infrared radiation are longer than waves of visible light, so ordinary digital cameras dont see them, and neither do the eyes of human beings. Although invisible to the eye, longer infrared radiation can be detected as warmth by the skin.
Brown dwarfs are another kind of deep-space object that will show up in WISEs pictures. These objects are failed stars-which means they are not massive enough to jump start the same kind of reactions that power stars such as the sun. Instead,brown dwarfs simply shrink and cool down. Theyre so dim that theyre almost impossible to see with visible light, but in the infrared spectrum they glow.
A. It is small in size but carries a large camera.
C. Its digital camera can help astronomers to see the unknown space.
32. Which is NOT the synonym for the word snap in the third paragraph?
B. shoot.
D. photograph.
A. is no different from an ordinary camera.
C. catches the infrared radiation while the ordinary camera does not.
34. Which of the following is NOT correct about asteroids according to paragraph 7?
B. Asteroids do not reflect light that reaches them.
D. The WISE telescope can take pictures of asteroids
A. Brown dwarfs give off visible light.
C. Brown dwarfs are power stars like the sun.
参考答案: CACAB
北师大版英语七上《Unit 5 Sports and Games》word学案
2015秋北师大版英语七上Get Ready《B your friend》word教案2
北师大版英语七上《Unit 1 Meeting People》word教案
北师大版英语七上《Unit 4 Food》word语法讲解
2015秋北师大版英语七上Get Ready《E Your room》word教案3
2012北师大版七上Unit 5《Sports and Games》word语法讲解2
北师大版英语七上《Unit 3 Home》word单元复习提纲
2015秋北师大版英语七上Get Ready《B your friend》word教案1
北师大版英语七上《Unit 2 Families》word教案
北师大版英语七上《Unit 4 Food》word教案
北师大版英语七上《Unit 2 Families》(Lesson 5 I have one sist)word教案
2015秋北师大版英语七上Get Ready《E Your room》word教案2
北师大版英语七上《Unit 6 School Life》word教案(2)
2015秋北师大版英语七上Unit 1《Family》单元知识点整理
北师大版英语七上《Unit 2 School Life》word单元复习提纲
2015秋北师大版英语七上Get Ready《A you》word教案1
2015秋北师大版英语七上Get Ready《A you》word教案4
2015秋北师大版英语七上Get Ready《D your classroom》word教案3
2012北师大版七上Unit 2《Families》word教案和练习(2)
北师大版英语七上《Unit 3 Houses and Homes》word语法讲解(2)
北师大版英语七上《Unit 1 Family》word单元复习提纲
2015秋北师大版英语七上Get Ready《D your classroom》word教案1
北师大版英语七上《Unit 4 Food》word学案
2012北师大版七上Unit 2《Families》word教案和练习(1)
2012北师大版七上Unit 2《Families》(Lesson 5)word教案
北师大版英语七上《Unit 6 School Life》word教案(1)
2012北师大版七上Unit 1《Meeting People》word语法讲解
2015秋北师大版英语七上Get Ready《A you》word教案3
2012北师大版七上Unit 2《Families》(Expansion2)word教案
2015秋北师大版英语七上Get Ready《E Your room》word教案4
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |