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Passage1
46. C store an unlimited number of human faces.
47. C To understand computers' problems with facial-recognition software.
48. D It decreases as the database size increases.
49. A They cannot easily tell apart people with near-identical appearances.
50. B There do not exist public databases with sufficient face samples.
Passage2
51. B They are acting in an irrational way.
52. A impractical
53. C Choose majors that will serve society's practical needs.
54. C It is well reflected in their average starting salary.
55. D College students should fund their own education.
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