单选题Which of the following is the best version of sentence 2 (reproduced below)?The medical community doesn't know the cause, has difficulty diagnosing it, and it is hard to test.A The medical community does not know the cause of the disease, has difficult

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单选题

Which of the following is the best version of sentence 2 (reproduced below)?The medical community doesn't know the cause, has difficulty diagnosing it, and it is hard to test.

The medical community does not know the cause of the disease, has difficulty diagnosing it, and cannot test for it.

Because the medical community does not know the cause, they cannot diagnose or test for it.

The medical community does not know the cause and has difficulty diagnosing it, so it is hard to test.

The medical community does not know the cause, diagnosis, or test.

Additionally, the medical community cannot cause, diagnose, or test for the disease.

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第1题

People in the medical()are divided in their opinion about the cause of this disease.A、workB、job

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第2题

The food we eat seems to have profound effects on our health.Although science has made enormous steps in making food more fit to eat ,it has, at the same time,made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well,especially cancer of the colon. Different cultures are more likely to cause certain different illnesses because of the food that is characteristic in these cultures. That food is related to illness is nto a new discovery. In 1945, about 35 years ago, government researchers realized that nitrates, commonly used to preserve color in meats,and other food additives,caused cancer. Yet, these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. The additives which we eat are not all so direct. Farmers often give penicillin to beef and living animals, and because of this ,penicillin has been found in the milk of treated cow. Sometimes similar drugs are given to animals not for medical purposes,but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration(FDA) has tried repeatedly to control these procedures, the practices continue. Which of the following statements is NOT ture? a.Drugs are always given to animals for medical reasons b.Some of the additives in our food are added to the food itself and some are given to the living animals c.Researchers have known about the potential dangers of food additives for over thirty-five years. d.Food may cause forty percent of cancer in world.

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第3题

A customer wants to know what version of DirectX the current workstation has installed. Which of the following command line tools would the customer use?（）A、editB、systeminfoC、gpedit.mscD、dxdiag

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第4题

An end user reports that their computer is not performing as fast as it used to and it shuts down unexpectedly. Which of the following is the MOST likely cause?（）A、Network data cables are damaged.B、Memory has become unseated.C、The user has defragmented the hard drive.D、Processor cooling fan is not functioning.

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第5题

A system powers on, begins POST, displays the BIOS version information and then hangs with the error message ‘Error loading operating system’. Which of the following is MOST likely the cause of this issue? （）A、A virus has infected the systemB、Corrupted BOOT.INI fileC、Corrupt MBRD、Boot sector corruption

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第6题

A user reports that the Windows update function will not run on the computer but the Internet can be accessed. The user is running an original version of Windows XP Professional. Which of the following is MOST likely the cause？（）A、The user has not registered the copy of Windows.B、The user has not applied at least Service Pack 1 to their system.C、The user does not know what site to access for the updates.D、The user needs to flush the DNS cache.

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第7题

The food we eat seems to have profound effects on our health.Although science has made enormous steps in making food more fit to eat ,it has, at the same time,made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well,especially cancer of the colon. Different cultures are more likely to cause certain different illnesses because of the food that is characteristic in these cultures. That food is related to illness is nto a new discovery. In 1945, about 35 years ago, government researchers realized that nitrates, commonly used to preserve color in meats,and other food additives,caused cancer. Yet, these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. The additives which we eat are not all so direct. Farmers often give penicillin to beef and living animals, and because of this ,penicillin has been found in the milk of treated cow. Sometimes similar drugs are given to animals not for medical purposes,but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration(FDA) has tried repeatedly to control these procedures, the practices continue. Which of the following statements is NOT ture?（）A、Drugs are always given to animals for medical reasonsB、Some of the additives in our food are added to the food itself and some are given to the living animalsC、Researchers have known about the potential dangers of food additives for over thirty-five years.D、Food may cause forty percent of cancer in world.

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单选题Which of the following is the best version of sentence 2 (reproduced below)?The medical community doesn't know the cause, has difficulty diagnosing it, and it is hard to test.A The medical community does not know the cause of the disease, has difficult

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