接触式密封装置因接触处的滑动摩擦造成动力损失和磨损，故用余低速情况。

患者，女性，68岁，家庭妇女。平素有高血压史，测血压为199／110mmHg。患者因情绪激动，突然昏倒，面赤气粗，牙关紧闭，双手紧握，喉中痰鸣，无二便失禁，脉弦滑而数。

阅读理解。

     Valentine's Day is a holiday honouring lovers. It is named

after Saint Valentine, an early Christian (基督教的)  churchman

who helped young lovers. Valentine was killed for his Christian

beliefs on February 14 more than 1 700 years ago, but the day that

has his name is even earlier than that.

      More than 2 000 years ago, the ancient Romans celebrated a

holiday for lovers. As part of the celebration, girls wrote their

names on pieces of paper and put them in a large container(容

器) .  Boys reached into the container and pulled one out.  The girl

whose name was written on the paper became his lover or sweet

heart for a year.

      Lovers still put their names on pieces of paper and they send

each other Valentine's Day cards that tell of their.love.  Sometimes

they also send gifts, like flowers or chocolate candy. Americans

usually send gifts and cards through the mail system. But some

use another way to send this message. They have it printed in a

newspaper. The cost is usually a few dollars. Some of the

messages are simple and short, "Jane, I love you very much. "

Others say more. This one, for example, "Dan, roses are red.

Violets are blue. I hope you love me as much as I love you.

Forever.  Mary. "

     Most of the newspapers that print such messages are local,

but USA Today is sold throughout the United States and 90 other

countries as well. This means someone can send a Valentine

message to a lover in a faraway city or town almost anywhere in the

world.  These messages cost 80 dollars or more.  An employee (雇

员) of USA Today says readers can have a small heart or rose

printed along with their messages this year. Will this kind of

Valentine's Day message reach the one you love? Well, just make

sure he or she reads the newspaper.

1. When was the day named after Valentine?  

A. More than 1,700 years ago before Valentine's death.

B. More than 2,000 years ago.

C. On February 24.

D. It is not mentioned in the passage.

2. Which is NOT true about the ancient Roman holiday?    

A. Girls put into a large container pieces of paper with their own names on them.

B. Boys and girls became sweet hearts by chance.

C. Girls and boys send gifts and cards through the mail system.

D. It was celebrated as a holiday for lovers.

3. What can be inferred from the passage? 

A. Printing a message to show one's love in USA Today will cost 80 dollars or more.

B. Valentine was killed for helping lovers.

C. Readers of USA Today can send roses to their lovers along with the printed messages.

D. Valentine was honoured by people for his firm Christianbelief and warm heart.

4. What is the purpose of the passage?  

A.To briefly introduce the origin of Valentine's Day and the modern style.

B.To advertise for USA Today.

C. To tell you that Americans are open to express their love.

D. To sell roses on Valentine's Day.

类风湿关节炎滑膜的病理特征是（）

A.血管翳形成

B.滑膜水肿

C.淋巴细胞浸润

D.滑膜增厚

E.滑膜消失或变薄

交界性早搏的心电图特征有（）

A.QRS波提前，形态、时限与正常窦性基本相同

B.QRS波宽大、畸形，T波与主波方向相反

C.早搏后代偿间歇往往不完全

D.P’波可与QRS波重叠，而辨认不清

E.早搏所产生的QRS波前或后有逆行P’波，P’-R<0.10秒

女性36岁，腹部膨隆半年，腹部可触及巨大包块，边界清楚，无压痛。

你认为应该做哪些检查？（）

A.CT

B.MRI

C.US

D.ECT

E.DSA