单选题Blood flowing from a cut artery appears（）.A dark red with a steady flowB bright red with a steady flowC bright red and in spurtsD dark red and in spurts

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单选题

Blood flowing from a cut artery appears（）.

dark red with a steady flow

bright red with a steady flow

bright red and in spurts

dark red and in spurts

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相似问题和答案

第1题：

He suffers from a rare (罕见的) blood ()

A、illness

B、sickness

C、disease

D、medicine

参考答案：C

第2题：

Blood flowing from a cut artery appears ______.

A.dark red with a steady flow

B.bright red with a steady flow

C.bright red and in spurts

D.dark red and in spurts

正确答案：C
动脉割开，出的血是鲜红色的。

第3题：

Which of the following statement is true? ()

A、Hepatitis A often leads to chronic liver disease.

B、Hepatitis B can be infected by sharing toothbrushes.

C、With the improvement of medical technology, the risk of catching

hepatitis from contaminated blood products and blood transfusions has decreased.

D、The symptoms of the hepatitis A, B and C are quite different from each other.

参考答案：C

第4题：

共用题干
Hypertension Drugs Found to Cut Risk of Stroke
Australian doctors declared Monday that a cocktail of simple antihypertensive drugs can lower the risk of patients suffering a repeat stroke by more than a third.This is the result of their research.The research, presented at a medical conference in Italy over the weekend,has been valued highly as a major breakthrough in stroke prevention.
Strokes kill 5 million people a year,and more than 15 million suffer non-fatal strokes that often leave them with useless limbs,slurred speech and other serious disabilities.One in five stroke survivors goes on to have a second,often fatal,stroke within five years of the first.
An international six-year study of 6,100 patients directed from Sydney University found that by taking two blood pressure-lowering drugs,the risk of secondary strokes can be reduced by up to 40 percent.Even taking one of the commonly available drugs can cut the risk by a third,the study said.The drugs are the diuretic indapamide ( 吲达帕胺）and the ACE inhibitor perindopril , better known by its brand name Cover- syl.The combination was effective even in patients who did not have high blood pressure,the researchers said.They even found that the risk of another stroke could be cut by three quarters among the one-in-ten pa- tients who had suffered a cerebral hemorrhage（出血）, the worst type of stroke , where there is direct bleeding into the brain.
Stephen McMahon,who presented the research at the Milan congress of the European Society of Hypertension,said about 50 million people were alive who had suffered at least one stroke."If most of those patients were able to get access to this treatment,it would result in maybe the avoidance of half a million strokes a year,"the professor told Australia's ABC Radio.
McMahon said doctors had long known that lowering the blood pressure of those with hypertension could help prevent strokes."What we have shown for the first time is that it does not really matter what your blood pressure is;if you have had a stroke,then lowering blood pressure will produce large benefits,to begin with-even for people whose blood pressure is average or below average,"he said.
McMahon said the Milan gathering had heralded the research as a"major breakthrough in the care of patients with strokes-perhaps the biggest step forward that we have made in the last couple of decades."

What patients among those who have a stroke will benefit greatly from taking blood pressure-lowering drugs?
A:Those whose blood pressure is high.
B:Those whose blood pressure is average.
C:Those whose blood pressure is below average.
D:All of the above.

答案：D

解析：

由文章第二段最后一句“One in five stroke survivors goes on to have a second , often fatal,stroke within five years of the first.”可知，中风以后存活的病人中，有1/5的人在第一次中风后5年内会再次中风，而且常常是致命的。故C为正确答案。
由文章第三段的内容可知，服用两种降压药中风复发的危险性可减少40%；单服一种药，其危险性降低1/3，即约33%。可见服用两种药比服用一种药可多减少大约7%，即大约1/14的危险性。
第二段第一句说非致命的中风常造成病人四肢残废、语言含糊不清以及其他严重残疾。B、C、D三项均属于中风的后遗症（D项的面部麻痹属于严重残疾之一），而A项“习惯性失眠”则不应属于中风的后遗症。故A是正确答案。
由文章第四段第二句“‘ If most of those patients were able to get access to this treatment , it would result in maybe the avoidance of half a million strokes a year,’”可知，如果大多数病人有机会进行这样治疗的话，每年就可以避免50万次中风的发生。故B为正确答案。
由文章倒数第二段的内容可知，血压高低并不重要，只要你得了中风，降低血压就有很大益处，即使血压正常或低于正常值也是如此。故D为正确答案。

第5题：

He was in hospital for six months．He felt as if he was__________from the outside world．

A.cut off
B.cut out
C.cut up
D.cut through

答案：A

解析：

句意为他在医院待了半年，感觉跟外界的联系都切断了。cut off“切除、切断”，符合句意，故选A。cut out“删去、关掉”，cut up“切开、切碎”，cut through“抄近路穿过、克服”，均排除。

第6题：

What is the purpose of the limit switch on gravity davits?

A.To cut off the power when the davits hit the track safety stops

B.To stop the davits from going too fast

C.To cut off the power when the davits are about 12 inches or more from the track safety stops

D.None of the above

正确答案：C

第7题：

He was in hospital for six months. He felt as if he was____ from the outside world.

A. cut off
B. cut out
C. cut up
D. cut through

答案：A

解析：

句意为：他在医院待了半年，感觉跟外界的联系都切断了。“cut off”切除、切断，符合句意，故选A。“cut out”删去、关掉，“cut up”切开、切碎，“cut through”抄近路穿过、克服，均排除。

第8题：

You have been badly injured in a car accident. It is necessary to give you a blood transfusion because you lost a great deal of blood in the accident. However, special care must be taken in selecting new blood for you. If the blood is too different from your own, the transfusion could kill you. There are four basic types of blood: A, B, AB, and O. A simple test can indicate a person's blood type, which, like hair color and height, is inherited from parents. Because of substances contained in each type, the four groups must be transfused carefully. Basically, A and B cannot be mixed. A and B cannot receive AB, but AB may receive A or B. O can give to any other group; hence, it is often called the universal donor. For the opposite reason, AB is sometimes called the universal recipient. However, because so many reactions can occur in transfusions, patients usually receive only salt or plasma (liquid) until their

1、A good title for this passage is ________.

A、Getting Blood and Plasma

B、Special Blood Types

C、Human Blood Types

D、The Blood Bank of a Hospital

2、The word "hence" in line 10 means _________

A、always

B、 often

C、 therefore

D、 seldom

3、In a blood transfusion, it is easiest to find the acceptable type of blood for a person with the blood type of ________

A、A

B、 B

C、 AB

D、 O

4、The purpose of using salt and plasma before a blood transfusion is to allow time ______.

A、to test the reactions to the transfusion

B、for matching the blood to be transfused with the patient's blood

C、 for the blood to be delivered from the blood bank

D、 to select a new type of blood for the patient

5、Most Europeans have blood type _________

A、A

B、B

C、O

D、A or O

正确答案：1C 2C 3C 4B 5C

第9题：

共用题干
Surgery Involving the Heart

1 The heart-lung machine(pump-oxygenator)is a valuable addition to the modern operating room.
This machine has made it possible to perform many operations on the heart and other thoracic organs which
could not otherwise be done.There are several types of machines in use,all of which serve as a temporary
substitute for the patient's heart and lungs.
2 The machine siphons off the blood from the large vessels entering the heart on the right side so that
no blood passes through the heart and lungs.The blood is returned to the general circulation for body
distribution through one of the large arteries.While passing through the machine,the blood is oxygenated by
means of an oxygen inlet,and carbon dioxide is removed by various chemical means.These are the processes
that normally take place between the blood and the air in the lung tissue.While in the machine,the blood is
also deformed to be sure that all air bubbles are removed,since such bubbles could be fatal to the patient by
obstructing blood vessels.An electric motor in the machine serves as a pump during the surgical procedure to
distribute the processed blood throughout the body by means of the artery mentioned above.
3 Diseased valves may become deformed and scarred from endocarditis so that they are ineffective and
often obstructive.In some cases a special small knife can be inserted into the heart chamber and the valve
can be cut so that it no longer obstructs the blood flow. The valve may even become partially functional.In
other cases there may be so much damage that replacement is the only resort. Substitute valves,made of
plastic materials have proved to be a lifesaving measure for many patients.Very thin butterfly valves made of
dacron（涤纶）or other synthetic material have also been successfully used.
4 Artificial hearts or parts of hearts designed to assist the ventricles in their pumping function have not
proved as successful as the artificial valves.However,research continues and it is quite possible that an
effective device may soon be ready for use.More spectacular is the transplantation of a human heart from the
body of a person who has recently died.Tissues of the donor and the recipient should be as closely matched
as possible to avoid rejection by the recipient's antibody mechanism.This rejection syndrome is the most
serious problem related to heart transplants.

The heart-lung machine is an essential helper for surgeons________.
A:and finally they fail to function properly
B:to perform many surgical operations on the chest
C:when it passes through the heart-lung machine
D:and they no longer obstruct the blood flow
E:to match tissues of the donor and the recipient
F: when the ineffective valves are replaced by artificial ones

答案：B

解析：

第一段的主要内容在第二句，人工心肺机使许多心脏和其他胸部器官的手术成为可能，故选C。
第二段详细叙述了人工心肺机的工作原理，它是如何在手术期间代替心脏的功能的。
第三段讲述了心脏瓣膜的手术及其代用品。
第四段主要讲述了心脏移植及其代用品。
由文章第二段第三句“While passing through the machine, the blood is oxygenated by means of an oxygen inlet , and carbon dioxide is removed by various chemical means.”可知，血液在通过人工心肺机时得以充氧，同时，二氧化碳也被排出。
由文章第一段前两句可知，人工心肺机是胸部外科医生必不可少的助手。
由文章第三段第一句“Diseased valves may become deformed and scarred from endocarditis so that they are ineffective and often obstructive.”可知，心内膜炎会致使心脏瓣膜畸形，使其遭受创伤，以致失去正常功能，故选A。
文章最后两句表明，组织匹配是为了避免排异反应，它是心脏移植中最重要的事情。

第10题：

Paragraph 3________
A:The Heart Transplantation
B:How the Heart-lung Machine Works
C:A Machine Making Many Kinds of Thoracic Operations Possible
D:A Temporary Substitute for the Diseased Valve
E:Operations on Cardiac Valves and Substitutes for Valves
F: How Every Part of the Heart Performs Its Function

答案：E

解析：

Blood flowing from a cut artery appears（）.

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