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问题 选择题

下列各句中没有错别字的一句是 [ ]

A.一个民族迎来了飞天梦圆的辉煌时刻。

B.然而，由于经济实力有限等各种原因，中国的飞天梦想只能沉封在一张张构思草图中。

C.他们都经过了进乎苛刻的各种身体测试。

D.中国科学家们把目光投向了更远的地方，提出一鼓做气载人飞天。

答案

答案：A

单项选择题

As one works with color in a practical, or experimental way, one is impressed by two apparently unrelated facts. Color as seen is a mobile, changeable thing (1) to a large extent on the relationship of the color (2) other colors (3) simultaneously. It is not (4) in its relation to the direct stimulus which (5) it. On the other hand, the properties of surfaces that give (6) to color do not seem to change greatly under a wide variety of illumination color, usually (but not always) looking much the same in artificial light as in daylight. Both of these effects seem to be (7) in large part to the mechanism of color (8) .

When the eye is (9) to a colored area, there is an immediate readjustment of the (10) of the eye to color in and around the area (11) . This readjustment does not promptly affect the color seen but usually does affect the next area to which the (12) is shifted. The longer the time of viewing, the higher the (13) , and the larger the area, the greater the effect will be (14) its persistence in the (15) viewing situation. As indicated by the work of Wright and Schouten, it appears that, at (16) for a first approximation, full adaptation takes place over (17) time if the adapting source is moderately bright and the eye has been in (18) darkness just previously. Also, (19) of the persistence of the effect if the eye is shifted around from one object to another, all of which are at similar brightness or have similar colors, the adaptation will tend to become (20) over the whole eye.

5（）

A.creates

B.summons

C.triggers

D.introduces
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口语交际，情景问答题

用所给词语写一段话，介绍上海世博会的盛况，要求语意完整，句意通顺，字数在30—50之间。（5分）　　

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