模板会议交流主题课件.ppt
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1、单击此处编辑主标题单击此处编辑主标题单击此处编辑副标题单击此处编辑副标题单击此处编辑标题单击此处编辑标题 正文部分样例A 正文部分样例B 正文部分样例C 正文部分样例D 正文部分样例I 正文部分样例II 正文部分样例III单击此处编辑标题单击此处编辑标题 正文部分样例A 正文部分样例B 正文部分样例C 正文部分样例D 正文部分样例I 正文部分样例II 正文部分样例III正文标题正文标题 第一级 第二级 第三级 第四级 第五级正文标题正文标题 第一级 第二级 第三级 第四级 第五级样例文本样例文本A样例文本样例文本A样例文本样例文本BAs seen from the Earth,a solar
2、eclipse occurs when the Moon passes between the Sun and the Earth,and the Moon fully or partially blocks the Sun as viewed from a location on Earth.This can happen only during a new moon,when the Sun and the Moon are in conjunction as seen from Earth.At least two,and up to five,solar eclipses occur
3、each year;no more than two can be total eclipses.12 Total solar eclipses are nevertheless rare at any particular location because totality exists only along a narrow path on the Earths surface traced by the Moons umbra.Some people,sometimes referred to as eclipse chasers or umbraphiles,34 will trave
4、l to remote locations to observe or witness a predicted central solar eclipse(see Types below).The solar eclipse of August 11,1999,in Europe helped to increase public awareness of the phenomenon,citation needed which apparently led to an unusually large number of journeys made specifically to witnes
5、s the annular solar eclipse of October 3,2005,and of March 29,2006.样例文本样例文本BAs seen from the Earth,a solar eclipse occurs when the Moon passes between the Sun and the Earth,and the Moon fully or partially blocks the Sun as viewed from a location on Earth.This can happen only during a new moon,when t
6、he Sun and the Moon are in conjunction as seen from Earth.At least two,and up to five,solar eclipses occur each year;no more than two can be total eclipses.12 Total solar eclipses are nevertheless rare at any particular location because totality exists only along a narrow path on the Earths surface
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