在电控发动机中，EGR阀称为（）。A.曲轴箱通风阀 B.废气再循环阀 C.三元催化装

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.

15（）

A.transparent

B.succeeding

C.simultaneous

D.proceeding

汽车示波器显示的直列波用于诊断点火系初次级电路接触情况以及电容器，低压线、高压线和火花塞等元件的性能。

清洗玻璃应先用（）润湿玻璃。

中国人的饭碗任何时候都要牢牢端在自己手上，我们的饭碗应该主要装中国粮。为切实保障国家粮食安全，下列选项中正确的是（）

①加大对农业投资→改善农田水利基础设施建设→单位亩产粮食产量增加→粮食供给增加

②加大科技投入→大力发展转基因技术→谷物生产能力增加→粮食供给增加

③降低人民币汇率→进口粮食成本降低→增加粮食进口→粮食供给增加

④加大对农业的财政补贴→农民收入增加→提高粮食生产积极性→粮食供给增加

A.①③

B.①④

C.②④

D.③④

要成为知名作家，对于他来说，是个遥远而曲折的目标。先把满口蹩脚的俚语改掉，才是个现实可及的正事。