试题与答案

女,62岁,双眼原发性闭角型青光眼,右慢性期,左临床前期,矫正视力右0.5,左0.8

题型:单项选择题 案例分析题

题目:

女,62岁,双眼原发性闭角型青光眼,右慢性期,左临床前期,矫正视力右0.5,左0.8

左眼行虹膜激光打孔术,其目的是()

A.提高视力

B.防止急性青光眼发作

C.治愈青光眼

D.改善视功能

E.增加房水外流

答案:

参考答案:B

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题型:阅读理解

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有多余选项。

The Dark Age of Greece

小题1:Among early civilizations, we call the low points "dark ages", because civilizations often dropped to such a low level that it is hard to get an accurate picture of their history during these periods. During a dark age, a civilization may not have produced monuments, statue, or other objects which we use to learn about early civilizations.

One' of the most important dark ages was the dark age of Greece,which lasted from about 1100 BC to 900 BC. Prior to-that-time,Greece had a highly advanced society called the Mycenaean civilization. The Mycenaeans were a trading civilization小题2:In fact, the Mycenaean civilization was so important that when it collapsed in the 12th centuryBC,most other civilizations in the region collapsed as well.The next 200 years are like a blank page to  historians and we know very little about this period.小题3:The collapse of the Mycenaeans brought an end to writing in the area, and thus an end to the written records historians rely on.

The little that we know about this period has been learned from archaeology. It seems that civilization became much less advanced. The pottery from this period is much simpler and less artistic. This suggests that there was lack of wealthy people to buy higher quality products. 小题4:   This would suggest a large decrease in population, possibly due to a widespread lack of food and consequent starvation.

Sometime around 800 BC, the Greeks began to emerge from this dark age, most probably due to the influence of other civilizations. They had lost their early writing system, but began to use the writing system of the Phoenicians at this time.小题5:Over the next 300 years, their civilization continued to rise, and their dark age was forgotten.

A.Many civilizations undergo a series of high points and low points during their history.

B.Many early civilizations underwent dark ages, but Greece never recovered from its dark age.

C.They began constructing larger cities and trading with their neighbors again.

D.Another interesting point is that most of the large cities of earlier time periods appear to have been abandoned in favor of much smaller settlements.E.Many pieces of evidence suggest that there was a huge increase in population during the dark age of Greece.

F.and they did much to spread their culture across the eastern Mediterranean.

G.One major reason for this is that writing basically stopped.

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题型:解答题
在袋子中装有10个大小相同的小球,其中黑球有3个,白球有n(2≤n≤5,且n≠3)个,其余的球为红球.
(Ⅰ)若n=5,从袋中任取1个球,记下颜色后放回,连续取三次,求三次取出的球中恰有2个红球的概率;
(Ⅱ)从袋里任意取出2个球,如果这两个球的颜色相同的概率是
4
15
,求红球的个数;
(Ⅲ)在(Ⅱ)的条件下,从袋里任意取出2个球.若取出1个白球记1分,取出1个黑球记2分,取出1个红球记3分.用ξ表示取出的2个球所得分数的和,写出ξ的分布列,并求ξ的数学期望Eξ.
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