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问题 单项选择题 A1/A2型题

儿童患传染病隔离终止时间，下列除哪项外，均为正确（）

A.流感病毒为退热后两日

B.风疹病毒到皮疹消退为止

C.腮腺炎病毒到腮腺肿胀消失为止

D.麻疹病毒到退热后3日为止

E.水痘病毒到部分皮疹结痂为止

答案

参考答案：E

解析：水痘病毒应隔离至全部皮疹干燥结痂后。

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.

18（）

A.efficient

B.parallel

C.relative

D.respective
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判断题

可以用剩磁法检查的零件应具有很强的磁性及矫顽力
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