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自测试题二(3)

2006-07-07 00:40

  Question 9 is based on the following graph

  9.Which of the following, if true, contributes most to

  an explanation of the change in ice cream sales?

  (A)Because of low demand for its transcontinental

  flights departing from the airport, one airline

  ceased offering such flights as of December

  31,1993.

  (B)There were fewer airline passengers who were

  traveling to destinations outside the United

  States in January1993 than there were in

  January1992

  (C)The average daily number of passengers at the

  airport in the month of January was the same

  for each of the three years

  (D)In January 1993 a blizzard forced all flights out

  of the airport to be canceled for three days,

  stranding many passengers at the airport.

  (E)There were five percent fewer commuter flights

  scheduled to depart from the airport in January

  1993 than there were in January of either 1991

  or 1992

  10.People whose bodies cannot produce the substance

  cytochrome P450 are three times as likely to develop

  Parkinson's disease, a disease that affects the brain,

  as are people whose bodies do produce this substance.

  Since cytochrome P450 protects the brain from toxic

  chemicals, toxic chemicals probably play a role in the

  development of Parkinson's disease.

  Which of the following, if true, most strongly

  supports the argument?

  (A)It will soon be possible for cytochrome P450 to

  be synthesized for the treatment of people

  whose bodies cannot produce this substance.

  (B)Many people whose bodies are unable to

  produce cytochrome P450 lack the ability to

  produce certain other substances as well.

  (C)Cytochrome P450 has no effect on the brain

  other than to protect it from toxic chemicals.

  (D)People with Parkinson's disease often exhibit a

  marked lessening in the severity of their symp-

  toms when they are treated with dopamine, a

  chemical produced naturally in the brain.

  (E)Many people with Parkinson's disease have the

  ability to produce cytochrome P450 naturally.

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