2017年12月英语四级阅读答案：试卷一仔细阅读1（沪江网校版）
分类: 大学四六级英语
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.