We can hardly find black flowers because ______. The red, orange and yellow lights contain ______.

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问题 We can hardly find black flowers because ______.
The red, orange and yellow lights contain ______.

选项 A、less heat than the other lights
B、more heat than the other lights
C、a great deal of heat
D、a little heat

答案C

解析 可从第二段结尾处“...the red light,orange light and yellow light,each of which has a large quantity of heat.”看出[C]项正确。
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