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Question 18M.1.SL.TZ1.28

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.1.SL.TZ1.28
Level SL Paper 1 Time zone TZ1
Command term Question number 28 Adapted from N/A
28.
[Maximum mark: 1]
18M.1.SL.TZ1.28

How are the insides of alveoli prevented from sticking together?

[1]

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B

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