更多"Why light in color is important to "的相关试题:
[单项选择]Why light in color is important to large animals in deserts
A. It helped them maintain a constant normal body temperature.
B. It reflects rather than absorbs the sun-light.
C. It helps them see their peers at night.
D. It keeps them keep cool during the night.
[单项选择]LIGHT: COLOR ::
A. (A) radiation: temperature
B. (B) celerity: span
C. (C) quality: quantity
D. (D) sound: pitch
E. (E) strength: stress
[单项选择]A) easy C) safe
B) light D) large
A. easy
B. light
C. safe
D. large
[单项选择]
Passage One
What is color Why do some objects look red, others green, others blue
Color is caused by reflected light rays. We see color because objects reflect light. Some thing that is red reflects mostly red light. In the same way, a green object reflects mostly green light. White objects reflect all colors of light. Black objects do not reflect any light.
What happens to the colors of light that are not reflected They are absorbed by the object. The darker the color, the less light is reflected and the more light is absorbed. Light that is absorbed is turned into heat. For this reason, dark-colored clothes are warmer in the sunlight than light-colored clothes.
Which statement is true according to the passage()
A. Not all objects reflect light.
B. All objects reflect light.
C. One particular object reflects only one color of light.
D. No objects will reflect all colors of light.
[单项选择]Why were the two large jets specially mentioned
A. To show the key role played by the air traffic controller.
B. To show the great responsibility of the pilots.
C. To give an example of air disasters.
D. To show that air travel is far safer than driving a car.
[单项选择]The light is still on. Why not ______
A. turn it on
B. turn it off
C. turn on it
D. turn off it