參考答案：

46-50：BADCA

51-55:CCBDD

46. what do velieve about aging ?

b)they just cannot do anything about It

47. how do many scientists view aging now?

a) might be prevented and treated

48. what does alex zhavoronkov think of describing aging as a disease ?

d)it will motivate doctors and pharmacists to find ways to treat aging.

49. what do we learn about the medical community?

c)they can contribute to people's health only to a limited extend, 

50. what does professor leonard hayflick believe

a)the human lifespan cannot be pro-longed

51. what do we learn about applicants postdoctoral positions in geosciences?

c)more males than females are likely to get outstanding letters of recommen dafion

52. what do studies about men and women in scientific research show?

C)Men are believed to be better able to excel in stem disciplines

53. what do the studies find about the recommendation letters for women appli cants?

b). they contain nothing that distin guishes the application.

54. what did dutt and her colleagues do with the more than 1, 200 letters of recommendation

d) they deleted all information about gender.

55. what does dutt aim to do with her study?

d) start a public discussion on how to raise women's status in academic circles.

專題推薦>>2017年12月英語四級真題及答案解析

考后關注：2017年12月英語四級成績查詢