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35. What do cost-based and competition-based approaches have in common?

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32. What is NOT a disadvantage of competition-based pricing for small businesses?

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27. From the information in paragraph 5, it is clear that WLEDs could be used in homes today if they were

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23. The word 'they' in paragraph 3 refers to

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28. The author gives details about the use of kerosene lights in paragraph 5 in order to

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22. According to the passage, a red LED is different from a green LED because it

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30. The word 'conventional' in paragraph 6 is closest in meaning to

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29. The electricity to power WLEDs in rural villages would come directly from

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21. In paragraph 2, which of the following is NOT mentioned as one of the problems with fluorescent lights?

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25. It can be inferred from the passage that the most recently developed type of LED is a powerful

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