急性冠状动脉综合征的病理基础最可能为（） A.冠状动脉狭窄 B._爱下问搜题

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问题单项选择题

急性冠状动脉综合征的病理基础最可能为（）

A.冠状动脉狭窄

B.冠状动脉内炎症

C.冠状动脉痉挛

D.冠状动脉内粥样斑块破裂、出血、不全或完全血栓形成

E.冠状动脉粥样斑块形成

答案

参考答案：D

解析：急性冠动脉脉综合征的发病机制是：冠状动脉内粥样斑块破裂或斑块内出血，内膜下层暴露，最终在斑块破裂处形成血栓，部分或全部阻塞冠状动脉。冠状动脉痉挛、冠状动脉斑块形成、冠状动脉内炎症、冠状动脉狭窄等四个选项均是属于急性冠动脉脉综合征形成的部分机制或因素。

完形填空

This story happened about a hundred years ago in a small village . One day , there was an earthquake . A huge rock fell from a nearby       . The rock        on the main road in the village .
When the earthquake stopped , many of the villagers came out into the road and saw the        rock . They decided to try to move the rock        it was in the middle of the road . Some of the        men in the village came to try to lift the rock out of the road . no matter how        they tried , they couldn’t move it . “well ,” they        , “there is nothing we can do for the rock . We will have to change the course of the road .”
All the while a young boy about 12 years old was watching the men trying to move the rock . “Excuse me , sir ,” he said , “but I think I can help you        the rock .” “You ?” they shouted . “What are you         about ? You can’t move this rock . All of us have just tried , and even        we can’t move        .” The men all       at the boy .
The next morning some people came into the street . One of them shouted , “The rock is gone .” It was true . The        wasn’t in the road anymore . In fact , no one could see it anywhere . “This is impossible ,” they said , “Where did it go ?” The twelve – year – old boy stood in the street ,         . “I buried it last night ,” he said , “You see , I dug a deep        next to the rock and then I dug a small incline（斜坡）up towards it . Then I covered it with dirt .”

单项选择题

中间调渐变式背景由人物肩部往上渐渐变深，具有（）效果。

A、渲染环境的

B、突出人物

C、空间感和立体感

D、把人物与环境融合的