男,45岁,有高血压史。因阵发性心悸2天来诊,体检:血压120/70mmHg,心率1

题型:单项选择题

问题:

男,45岁,有高血压史。因阵发性心悸2天来诊,体检:血压120/70mmHg,心率180次/分,律齐,心音正常,无杂音。1分钟后心率降至80次/分,律齐。30秒后又回复至180次/分。最可能的诊断为()

A.窦性心动过速

B.阵发性心房颤动

C.阵发性室上性心动过速

D.阵发性心房扑动

E.第三度房室传导阻滞

考点:上海住院医师神经内科心脏内科心脏内科题库
题型:单项选择题

观察下图,结合所学知识判断下列说法不正确的是()

A.它反映了美国的政党政治

B.驴和象分别代表民主党和共和党

C.两个政党在本质上不同

D.两党对垒,交替执政,是美国共和政体的特色

题型:单项选择题

Reading comprehension

     Last week I visited one of my old neighborhoods in Washington D.C. I had not been there for twenty

years and as I walked along the street, my mind was flooded by memories of the past. I saw the old

apartment building where I had lived and the playground where I had played. As I viewed these once

familiar surroundings, images of myself as a child there came to mind. However, what I saw and what I

remembered were not the same. I sadly realized that the best memories are those left untouched.

     My old apartment building, as I remember, was bright and alive. It was more than just a place to live.

It was a movie house, a space station, or whatever my young mind could imagine. I would steal away

with my friends and play in the basement. This was always exciting because it was so cool and dark, and

there were so many things there to hide among. There was a small river in the back of the building. We

would go there to lie in the shade of trees and enjoy ourselves.

     However, what I saw was completely different. The apartment building was now in disrepair. What

was once more than a place to live looked hardly worth living in. The windows were all broken. The

once clean walls were covered with dirty marks. The river was hardly recognizable. The water was

polluted and the trees and flowers were all dead. The once sweet-smelling river now smelled terrible. It

was really heartbreaking to see all this.

     I do not regret having seen my old neighborhood. However, I do not think my innocent childhood

memories can ever be the same. I suppose it is true when they say, "You can never go home again."

1. In the first two paragraphs of the passage the writer tries to tell us that ________.

A. he had lived in Washington D.C. for twenty years

B. he was very imaginative when he was a child

C. he had had pleasant memories of his old neighborhood

D. he had come from a very poor neighborhood

2. How did the writer feel when he visited his old neighborhood in Washington D.C.?

A. Greatly surprised.

B. Very regretful.

C. Quite excited.

D. Very sad.

3. On his visit to his hometown, the writer found the old apartment building ________.

A. seemed unfit to live in

B. had been repaired

C. could hardly be recognized

D. looked dirty and smelt horrible

4. "You can never go home again" in the last sentence of this passage means that ________.

A. one should never revisit his hometown after many years of absence

B. one will never find his hometown the same as it was in his childhood memory

C. a visit to one's hometown will bring back one's pleasant memories of home

D. a visit to one's hometown will bring back many sad memories

题型:单项选择题

用细绳AC和BC吊起一重物,两绳与竖直方向的夹角如图所示,AC能承受的最大拉力为150N,BC能承受的最大拉力为100N,为使绳子不断裂,所吊重物的质量不得超过多少?(g取10m/s2

题型:单项选择题

建设工程项目实施阶段策划的主要任务是( )。

A.项目实施的环境和条件的调查与分析
B.项目目标的分析和再论证
C.定义如何组织开发或建设
D.定义开发或建设的任务和意义

题型:单项选择题

重大操作方案现场人员安排必须包括总指挥、操作人员、测试人员、值守人员,缺一不可。

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