The primary purpose of the passage is to
A．point out that theories about the functioning of olfactory sensation have failed to change despite experimental inquiry
B．suggest means by which the impact of odors that irritate human subjects may eventually be lessened
C．describe the attempt of scientists to understand the degree to which odor perception is learned or innate
D．demonstrate that efforts to understand the psychobiological basis for human perception is too difficult for modern laboratory techniques
E．describe how the emotional pairing process in odor sensation can lead to the experience of irritation

相关问题推荐

• The famous novel is said ______into Chinese.
  [ A] to have translated
  [ B ] to be translate
  [ C] to have been translated
  [ D] to translate

  查看答案

• Ms. Blunsden is a 38-year-old woman who lives by herself in Brooklyn, New York. She has no right to keep any animals now. A police officer told a Brooklyn court （法庭) that he had found 15 dogs and 20 cats living in a small room which was just 10 feet by 12 feet. "There was not enough place for one animal, let alone 35," he said. "The room was very dirty."
  "The animals are taken good care of," Ms. Blunsden told the court. "I take them all for walks in a shopping cart （购物车)." When the court asked Ms. Blunsden why she kept so many animals, she said, "Everybody loves animals and I do, too. You may think that my room is too small for so many animals, but I think it is just right."
  The court ordered the animals to be taken to a place where they could be taken good care of. The court also ordered Ms. Blunsden to get help from Dr. Eugene Wilson, whose clinic （诊所) is well-known for taking care of such cases.
  People are beginning to keep many animals, and Ms. Blunsden's case will not be the only one of its kind.
  The court thought Ms. Blunsden could not keep animals because______.
  A．her dogs and cats were kept together
  B．she didn't take animals for walks
  C．her room for animals was too small

  查看答案

• An estimated 20 percent of the U. S. population has no bank account. More than half of this group don't have credit card __ can not get bank loans.
  A．or
  B．so
  C．and
  D．yet

  查看答案

• 听第8段材料，回答第10 ~12题。

  When do children start school in the man's country？

  [ A] At seven. [B]At six. [C] At five.

  查看答案

• How many animals did the police officer find in Ms. Blunsden's home？
  A．15.
  B．20.
  C．35.

  查看答案