填空题

All the books ______ (sell) out before I moved to the new house.

【参考答案】

had been sold
<上一题 目录 下一题>
热门 试题

单项选择题
A. Yes, I’d like to listen to it. B. Yes, the topic is interesting.C. No, I can’t hear anything. D. No, he is not a teacher.
A. Yes, I’d like to listen to it.
B. Yes, the topic is interesting.
C. No, I can’t hear anything.
D. No, he is not a teacher.
填空题
What is color Why do some objects look red, others green, still others blue Color is caused by (11) light rays. We see color because objects reflect light. Something that is red reflects (12) red light. It reflects a little green or blue light, too, but we do not see it. In the same way, a green object reflects mostly green light. White objects reflect (13) 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 (14) the color, the less light is reflected and the more light is absorbed. Light that is absorbed is (15) heat. For this reason, dark-colored clothes are wanner in the sunlight than lighter-colored clothes.
相关试题