41. What is so special about WISE?
A It is as small as a trashcan.
B It is small in size but carries a large camera.
C Its digital camera can help astronomers to see the unknown space.
D Never before has a telescope carried a digital camera in space.
答案:C
42. The camera on WISE
A is equipped with expensive computers.
B produces images of objects giving off infrared radiation.
C reflects light visible to the human eyes.
D is similar to an ordinary digital camera.
答案:B
43. It is true that infrared radiation.
A is not detectable to humans.
B looks brighter than visible light.
C is visible light reflected off an object.
D has longer waves than those of visible light.
答案:D
44. Which of the following statements about asteroids is NOT ture?
A The WISE telescope can catch and take pictures of them.
B They do not reflect light that reaches them.
C They float through space giving off visible light.
D They are invisible to ordinary cameras.
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