26: B admiring
27: M sealed
28: I natural
29: C contains
30: K released
31: L revealing
32: 0 substance
33: G liquid
34: evidence
35: potential
36:E段落第一句: USPS has sophisticated emergenc
37:Ⅰ段落第一句: Mail companies are logistics
38:C段落第一句: As global surface temperatures in
39∶G段落第一句: Every day, USPS processes, on a
40:K段落第一句: Rebuilding can take a long time
41:F段落第一句: As soon as it' s safe enough to b
42:B段落第一句: Even the united states postal
43:J段落第一句: Private courier companies, wh
44:D段落第一句: Days after the deadly2017 wild
45：H 段落第一句：it can be hard to identity which parcels are carrying crucial items.
46-50:AI助手
46: B It is a course designed for students to learn online.
47: CStudents'questions were unsatisfied weith the assistants 48: A She turned out to be a great success
49: D They could not tell her from a real person
50: C Assign her to answer more of students'questions
5551-55:科學(xué)籌款
51: C Not all of them achieved their anticipated goals
52: B To identify reasons for their different outcomes 53: B Its interaction with prospective donors
54: A They should be small to be successful
55: D Thcir fccling of conncction to the scientists themsclves
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