[单项选择]第三篇 The Body Thieves In the early nineteenth century in Britain，many improvements were being made in the world of medicine．Doctors and Surgeons were becoming more knowledgeable about the human body．Illnesses that had been fatal a few years before were now curable．However, Surgeons had one problem．They needed dead bodies to cut up，or dissect(解剖)．This was the only way that they could learn about the flesh and bones inside the body。and the only way to teach new surgeons to carry out operations． 、 The job of finding these dead bodies was carried out by an unpleasant group of people called“body snatchers’’．They went into graveyards(墓地)at night and，using wooden shovels to make less noise。dug up any recently buried bodies．Then they took the bodies to the medical schools and sold them．A body could be sold for between￡5 and~10，which was a lot of money at that time．The doctors who paid the body snatchers had all agreement with t}them—they never asked any
A. they had been stolen．
B. they had been strangled．
C. they had been dissected．
D. they had been buried．

[单项选择]第三篇 The Body Thieves In the early nineteenth century in Britain，many improvements were being made in the world of medicine．Doctors and Surgeons were becoming more knowledgeable about the human body．Illnesses that had been fatal a few years before were now curable．However, Surgeons had one problem．They needed dead bodies to cut up，or dissect(解剖)．This was the only way that they could learn about the flesh and bones inside the body。and the only way to teach new surgeons to carry out operations． 、 The job of finding these dead bodies was carried out by an unpleasant group of people called“body snatchers’’．They went into graveyards(墓地)at night and，using wooden shovels to make less noise。dug up any recently buried bodies．Then they took the bodies to the medical schools and sold them．A body could be sold for between￡5 and~10，which was a lot of money at that time．The doctors who paid the body snatchers had all agreement with t}them—they never asked any
A. some illnesses remained incurable．
B. few people were willing to work as surgeons．
C. medical expenses were too high．
D. dead bodies were not easily available

[单项选择]第三篇 The Body Clock Why is it that flying to New York from London will leave you feeling less tired than flying to London from New York The answer may be a clear case of biology not being able to keep up with technology. Deep inside the brain there is a ’clock’ that governs every aspect of the body’s functioning: sleep and wake cycles, levels of alertness, performance, mood, hormone levels, digestion, body temperature and so on. It regulates all of these functions on a 24-hour basis and is called the biological clock. The body clock programmes us to be sleepy twice a day, between 3-5 am and again between 3-5 pm. Afternoon tea and nap are all cultural responses to our natural biological sleepiness in the afternoon. One of the major causes of the travellers’ malady known as jet lag is the non-alignment of a person’s internal body clock with clocks in the external world. Crossing different time zones confuses the biological clock, which then has to adjust to the new time an
A. enable us to sleep 6 hours a day.
B. help us adapt to a 24-hour cycle.
C. regulate the body’s functions.
D. interfere with the body’s functions.

[单项选择]The Body Thieves
In the early nineteenth century in Britain, many improvements were being made in the world of medicine. Doctors and surgeons were becoming more knowledgeable about the human body. Illnesses that had been fatal a few years before were now curable. However, surgeons had one problem. They needed dead bodies to cut up, or dissect (解剖). This was the only way that they could learn about the flesh and bones inside the body, and the only way to teach new surgeons to carry out operations.
The job of finding these dead bodies was carried out by an unpleasant group of people called "body snatchers". They went into graveyards (墓地) at night and, using wooden shovels to make less noise, dug up any recently buried bodies. Then they took the bodies to the medical schools and sold them. A body could be sold for between ￡5 and ￡10, which was a lot of money at that time. The doctors who paid the body snatchers had an agreement with them—they never asked any questions. Th
A. some illnesses remained incurable.
B. few people were willing to work as surgeons.
C. medical expenses were too high.
D. dead bodies were not easily available.

[单项选择]第三篇 　　 Water 　　The second most important constituent (构成成份) of the biosphere (生物圈) is liquid water. This can only exist in a very narrow range of temperatures, since water freezes at 0℃ and boils at 100℃. Life as we know it would only be possible on the surface of a planet which had temperatures somewhere within this narrow range. 　　The earth’s supply of water probably remains fairly constant in quantity. The total quantity of water is not known very accurately, but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers. Most of it is in the form of the salt water of the oceans about 97 percent. The rest is fresh, but three quarters of this is in the form of ice at the Poles and on mountains, and cannot be used by living systems until melted. Of the remaining fractional which is somewhat less than one per cent of the whole, there is 10—20 times as much stored underground water as t
A. in the center of the earth.
B. on the surface of our planet.
C. in a very narrow range of temperatures.
D. in the coastal areas of the earth.