Currently, the most successful method of harnessing and using solar energy to produce electricity is the photovoltaic devices.
Answer the following statement true (T) or false (F)
True
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The European Commission's "20/20/20 by 2020" plan refers an overall European attempt to:
A. become more environmental. B. reform the education systems. C. improve healthcare, especially the vision of children. D. stimulate the economy.
You have a land use map that shows land use classes of urban, agricultural, commercial, and so on. Which operation will you use to get a new map that only shows agricultural land use?
A. Eliminate B. Clip C. Erase D. Select
Compared with the resultant of a pair of equal-length vectors at right angles to each other, the resultant when the angle is less than 90° is
A. less. B. greater. C. the same. D. need more information
Organisms commonly develop new traits because they desire them.
Answer the following statement true (T) or false (F)