问题 单项选择题 案例分析题

一位60岁男性患者,高血压史已五年。2小时前在劳动时突发剧烈头痛,在急诊室时,检查血压为23.4/13.6kPa(180/105mmHg),神清,右上、下肢肌力Ⅱ级,右侧痛觉明显减退。入院后,血压未再波动,但神志转入昏迷、瞳孔左]右,左侧瞳孔对光反应消失,颈稍强,右侧肢体仍未见活动,右侧Babinski征(+),左侧Gordon征(+)。

高血压性脑出血的主要机理是:()

A.脑内动脉外膜不发达,管壁较薄,易致破裂出血

B.动脉硬化内膜粗糙,形成内膜溃疡,在高血压作用下而血管破裂

C.在高血压基础上,合并脑内动静脉畸形,故易出血

D.持续高血压可使小动脉硬化,脂肪玻璃样变,形成微动脉瘤导致破裂

E.实质上是脑内静脉循环障碍和静脉破裂

答案

参考答案:D

阅读理解

American black bears appear in a variety of colors despite(尽管) their name. In the eastern part, most of these bears have shiny black fur, but in the west they grow brown, red, or even yellow coats. To the north, the black bear is actually gray or white in color. Even in the same litter(胎), both brown and black furred bears may be born.

Black bears are the smallest of all American bears, ranging in length from five to six feet, weighing from three hundred to five hundred pounds. Their eyes and ears are small and their eyesight and hearing are not as good as their sense of smell. Like all bears, the black bear is timid and rarely dangerous, but if attacked, most can climb trees or cover ground at great speed. When angry or frightened, they are formidable(可怕的) enemies.

Black bears feed on leaves, roots, fruit, insects, fish, and even larger animals. One of the most interesting characteristics of bears, including the black bear, is their winter sleep. Unlike squirrels and many other woodland animals, bears do not actually sleep through the winter months. Although the bear does not eat during the winter months, sustaining(维持) itself from body fat, its temperature remains almost normal, and it breathes regularly four or five times per minute.

Most black bears live alone, except during the mating(交配) season. They prefer to live in caves. Baby black bears are born in January or February after a gestation(怀孕) period of six to nine months, and they stay with their mother until they are fully grown or about one and a half years old. Black bears can live as long as thirty years in the wild, and even longer in some nature reserves.

小题1:American black bears may have ___________ colours according to the passage.

A.four

B.five

C.six

D.seven小题2:Black bears have a good sense of _________.

A.hearing

B.smell

C.eyesight

D.taste小题3:Which of the following statements is RIGHT?

A.Black bears sleep through the winter months.

B.Black bears can live up to 30 years old.

C.Black bears are the smallest bears in the world.

D.Most black bears live in a group.小题4:What does the underlined word “enemies” refer to?

A.Black bears’ enemies.

B.Black bears.

C.Other large animals.

D.American bears.小题5:We cannot read the passage ___________.

A.in a newspaper

B.on the Internet

C.in a book

D.in an advertisement

问答题 简答题