材料一：那是我小时候，常坐在父亲肩头，父亲是儿那登天的梯，父亲是那拉车的牛。忘不

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.

9（）

A.drawn

B.left

C.exposed

D.subjected

2011年“6?5”世界环境日的中国主题确定为“共建生态文明，共享绿色未来”。这一主题强调生态文明、绿色发展理念和公众参与，号召全社会行动起来为可持续发展之路作出贡献。这要求我们[ ]

①坚持发展的观点，推动自然与社会的可持续发展

②按自然规律办事，自觉适应自然界的变化

③发挥主观能动性，加速对自然利用的进程

④坚持联系的观点，统筹人与自然界的和谐发展

A．②③

B．①③

C．①④

D．②④

建筑场地的环境分类主要是根据( )。

A．(A) 气候区、土层含水性、于湿交替和冻融交替情况

B．(B) 干旱区、土层透水性、于湿交替和冻融交替情况

C．(C) 气候区、土层透水性、干湿交替和冻融交替情况

D．(D) 气候区、土层透水性、干湿交替和地下水的情况

市场是一切（）关系的总和。

平衡能力差的病人应选用

A．T形单足手杖
B．三足手杖
C．腋杖
D．问号形单足手杖
E．四足手杖