2017年12月英语四级阅读答案：试卷一仔细阅读1
日期:2017-12-16
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.