2017年12月英语四级仔细阅读答案(试卷一,46-50)

来源:沪江

答案

46. D) In what way it can be beneficial.
47. C) She got some idea from previous studies on birds and dolphins.
48. A) She monitored the brain activity of participants sleeping in a new environment.
49. C) She exposed her participants to two different stimuli.
50. B) They tended to perceive irregular beeps as a threat.

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