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问题 填空题

如果挡土墙在土压力作用下不向任何方向移动或转动而保持原来的位置，则作用在墙背上的土压力称为______。

答案

参考答案：静止土压力

解析： 本题主要考查的知识点为静止土压力的概念。
[要点透析] 静止土压力是指当挡土墙在土压力作用下不向任何方向移动或转动而保持原来的位置时，作用在墙背上的土压力。

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.

13（）

A.publicity

B.necessity

C.density

D.intensity
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单项选择题

下列关于Applet的叙述中，正确的是( )。

A．Applet是Java类，所以可以由JDK中的解释器javexe直接解释运行

B．Applet应该定义为javaappleApplet类或javswinApplet类的子类

C．Applet与Application的主要区别在编译方式上

D．通过在Applet中使用getParNneter可从HTML文件中获得参数
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