练习：

1 .What is so special about WISE?

A  It is small in size but carries a large camera.

B  It is as small as a trashcan.

C  Its digital camera can help astronomers to see the unknown space.

D  Never before has a telescope carried a digital camera in space.

2. Which is NOT the synonym for the word "snap" in the third paragraph?

A  make.

B  shoot.

C  take

D  photograph.

3. The camera on WISE

A  is no different from an ordinary camera.

B  does not see infrared radiation while the ordinary camera does.

C  catches the infrared radiation while the ordinary camera does not.

D  reflects light that human eyes can see.

4. Which of the following is NOT correct about"asteroids" according to paragraph 7?

A  Asteroids float through space giving off visible light.

B  Asteroids do not reflect light that reaches them.

C  It is difficult to take asteroids' pictures by ordinary cameras,

D  The WISE telescope can take pictures of asteroids

5.What is implied in the last paragraph?

A  Brown dwarfs give off visible light.

B  Brown dwarfs give off infrared radiation.

C  Brown dwarfs are power stars like the sun.

D  Brown dwarfs are impossible to see with the WISE telescope.

答案与题解：

1. C  短文的第一和第二段提供了答案。WISE 的特殊之处就在于，虽然体积小，但它的数码相机能拍到任何天体，所以能够帮助天文学家观测到宇宙空间中（ in the known universe ）的未知天文现象。其他选项都不是短文表达的意思。

2. A  snap 是个多义词，可以解释为“拍照”，更为确切的意思是“拍快照”。这里shoot, take 和photograph 都是snap 的同义词。

3. C  短文第六段和第四段提供了答案。人类的肉眼和普通相机看到的光是visible lights ，看不见红外线辐射（ infrared radiation) ，而WISE 的相机能够看到。

4. A  短文第七段第二句说并非所有的宇宙中的物体都会发出可见光，比如asteroids ，所以A是正确选项。其他选项的内容都可以在该段中找到。

5. B 最后一段的第一句说，褐矮星能出现在WISE 照片中，根据上文对WISE 望远镜的描述只有WISE 望远镜才能拍到红外线射线，所以B是正确选择。