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There have been many important developments in medicine．The following are two developments that have been very important in saving lives．
Imagine having an operation and being wide awake．This won’t happen，thanks to something called anesthetic．Anesthetics are given to people during operations so that they fall asleep．Anesthetics cause the muscles to relax and the body to become numb（lose all feeling）so that no pain is felt．This helps the doctors to operate more easily．Anesthetics may be taken in different ways：
●Breathing in a gas
●An injection straight into the bloodstream
●Swallowing a tablet
A local anesthetic numbs only the area where the doctor needs to work．A general anesthetic is when a Patient is put into sleep while the doctor operates Anesthetics were first given in 1844．
Heart disease is one of the biggest killers in the world today Luckily，something can be done about it．Someone who has an unhealthy heart can have a heart transport operation．A heart transplant is when the damaged heart of a patient is taken out and a healthy heart is put in．It is said，though，that the healthy heart has to come from someone who has died Doctor Barard from South Africa was the first person to do a heart transplant operation in 1967．Many successful transplants have been done since then．
It is wonderful what doctors are able to do for us．
（ ）1．With the help of______，patients aren’t able to feel painful during the operations．
A．injections B．pills C．gas D．anesthetics
（ ）2．Anesthetics have been used for about______．
A．200 B．184 C．165 D．41
（ ）3．Which does a doctor use to do a heart transplant operation to save lives，a damaged heart or a healthy heart?
A．A damaged heart B．A healthy heart C．Both D．Neither
查看习题详情和答案>>a house outside the school and took his mother there. In this small room, they began their new life. Every
morning, as soon as Liu Ting gets up, he takes his mother's blood pressure (血压)-After that, he makes
breakfast and then goes to school. In order to manage daily cost, he has a part-time job in the school's
canteen (食堂). Thanks to this job, he can have free dinners and get 50 yuan a month. Besides, he is allowed
to bring meals to his mother from the canteen every day.
Liu Ting doesn't have time to do his homework until his mother gets to sleep late at night. The 19-year-old
boy sleeps only six hours every day. It is no surprise that he got ill. "He was absent that day. We went to his
house to see what had happened. When we arrived, we saw that both he and his mother were lying in bed
because of illness," said his classmates.
From then on, Liu Ting's story was known by his classmates and teachers. Even more people knew his
story after it was reported on TV. People donated over 200, 000 yuan in order to treat his mother's illness.
In late 2005, a hospital in Shanghai agreed to operate (手术) on his mother. Now his mother is getting better
and better. Liu donated the rest 40, 000 yuan to set up a fund (基金) to support other poor college students.
Liu Ting said, "I know that there are people who have a better life. I just try my best to control my life and
make it better. I'll take part in more charity activities to express my thanks to society. I am very happy when
helping others."
B. He goes to school.
C. He makes breakfast for his mother.
D. He takes his mother's blood pressure.
B. he got up too late
C. he had only a short time to sleep
D. he watched TV too much
B. he kept all the rest money as his own
C. his classmates knew his story from newspapers
D. he could get 50 yuan every year
B. Liu Ting is a person with great love
C. Iiu Ting goes to college with his sick mother
D. Liu Ting is willing to help his classmates
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