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(1) Why does the author mention "a crow" in line 12?
(A) to indicate the size of Archaeopteryx.
(ÔÎÄÈçÏ£ºArchaeopteryx were animals about the size of a crow.)
(2) The author mentions airplanes in line 8 in order to?
(A) illustrate the size of wingspans in some pterosaurs
(ÔÎÄÈçÏ£ºThe largest fossil discovered is of an individual that had a wingspan of 50 feet or more, larger than many airplanes)
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