The World Almanac & Book of FactsNewspaper Enterprise Association, 1992 |
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第 1 到 3 筆結果,共 75 筆
第 253 頁
... earth in a period whose mean or average duration is 27 days 7 hours 43.2 minutes . This is the moon's sidereal period . Because of the motion of the moon in common with the earth around the sun , the mean duration of the lu- nar month ...
... earth in a period whose mean or average duration is 27 days 7 hours 43.2 minutes . This is the moon's sidereal period . Because of the motion of the moon in common with the earth around the sun , the mean duration of the lu- nar month ...
第 254 頁
... earth is believed to be derived from radioactivity in the rocks , pressures developed within the earth , and original heat ( if the earth in fact was formed at high temperatures ) . Atmosphere of the Earth The earth's atmosphere is a ...
... earth is believed to be derived from radioactivity in the rocks , pressures developed within the earth , and original heat ( if the earth in fact was formed at high temperatures ) . Atmosphere of the Earth The earth's atmosphere is a ...
第 255 頁
... Earth The geographic ( rotation ) poles , or points where the earth's axis of rotation cuts the surface , are not abso- lutely fixed in the body of the earth . The pole of rota- tion describes an irregular curve about its mean posi ...
... Earth The geographic ( rotation ) poles , or points where the earth's axis of rotation cuts the surface , are not abso- lutely fixed in the body of the earth . The pole of rota- tion describes an irregular curve about its mean posi ...
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