选择题:What is your favorite color? Do you like yellow, o

题目内容:
What is your favorite color? Do you like yellow, orange, and red? If you do, you must be an optimist (乐观者), a leader, and an active person who enjoys life, people and excitement. Do you prefer grays and blues? Then you are probably quiet, shy and you would rather follow than lead. You tend to be a pessimist. At least, this is what psychologists (心理学家) tell us, and they should know, because they have been seriously studying the meaning of color preference, as well as the effect that colors have on human beings. They tell us among other facts, that we do not choose our favorite color as we grow up — we are born with our preference. If you happen to love brown, you did so, as soon as you opened your eyes, or at least as soon as you could see clearly.
Color does influence our moods (情绪) ― there is no doubt about it. A yellow room makes most people feel more cheerful and more relaxed than a dark green one; and a red dress brings warmth and cheer to the saddest winter day. On the other hand, black is depressing. A black bridge over the Thames River, near London, used to be the scene of more suicides than any other bridge in the area — until it was repainted green. The number of suicide attempts immediately fell sharply; perhaps it would have fallen even more if the bridge had been done in pink or baby blue.
Light and bright colors make people not only happier but also more active
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设A与B是两个相似n阶矩阵,则下列说法错误的是() A.|A|=|B| B.秩(A)=秩(B) C.

设A与B是两个相似n阶矩阵,则下列说法错误的是() A.|A|=|B| B.秩(A)=秩(B) C.存在可逆阵P,使P^-1AP=B D.λE-A=λE-B

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[填空题,2.5分] 当前世界上解决资源配置和资源利用的经济制度基本有两种,一种是_____,另一种

[填空题,2.5分] 当前世界上解决资源配置和资源利用的经济制度基本有两种,一种是_____,另一种是________

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