http://bailiedu.com
9
鏈?/p>
20
鍙?/p>
GRE
闃呰鏈虹粡瑙ｆ瀽涔嬮暱闃呰
鎯宠鐭ラ亾鍒氬垰杩囧幓鐨?/p>
GRE
鑰冭瘯涓紝
GRE
闃呰
绌剁珶鏈変粈涔堥鐩悧
?
浠婂ぉ灏忕紪涓鸿�冪敓鍒嗕韩
2015
骞?/p>
9
鏈?/p>
20
鍙?/p>
GRE
闃呰鏈虹粡瑙ｆ瀽涔嬮暱闃呰
銆傛洿澶?/p>
GRE
鑰冭瘯鐪熼璇峰叧娉ㄥ墠绋嬬櫨鍒?/p>
GRE
瀹樼綉銆?/p>
闀块槄璇?/p>
In 1995 the Galileo spacecraft captured data about Jupiter's atmosphere--
namely, the absence of most of the predicted atmospheric water--that
challenged prevailing theories about Jupiter's structure. The unexpectedness of
this finding fits a larger pattern in which theories about planetary composition
and dynamics have failed to predict the realities discovered through space
exploration. Instead of "normal planets" whose composition could be predicted
by theory, the planets populating our solar system are unique individuals whose
chemical and tectonic identities were created through numerous contingent
events. One implication of this is that although the universe undoubtedly holds
other planetary systems, the duplication of the sequence that produced our
solar system and the development of life on Earth is highly unlikely.
Recently planetary scientists have suggested that the external
preconditions for the development of Earth's biosphere probably included four
paramount contingencies. First, a climate conducive to life on Earth depends