The largest european city which is not actually the capital of a country is
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What evidence does the writer give to support his argument about coral reefs? a) he speaks of the activities of coral polyps. b) he describes the composition of the great barrier reef. c) he emphasizes the ways in which coral reefs are fragile. d) he points out the ways that scientists do research on the reefs.

In a command economy, the majority of goods and services are provided by the

Who developed the theory of plate tectonics?