In November 2016,Donald Trump,the Republican presidential candidate,defeated the highly popular Hillary Clinton,and became president elect of the United States.It is generally believed that Trump’s policies are hard ...In November 2016,Donald Trump,the Republican presidential candidate,defeated the highly popular Hillary Clinton,and became president elect of the United States.It is generally believed that Trump’s policies are hard to predict because of his lack of political experiences.The author believes that,it is necessary for the US展开更多
This paper compiles lithostratigraphic and geochronological data obtained for the Palaeoproterozoic glacial diamictite-bearing successions,and thereby provides insights into understanding the geological processes caus...This paper compiles lithostratigraphic and geochronological data obtained for the Palaeoproterozoic glacial diamictite-bearing successions,and thereby provides insights into understanding the geological processes causing the Huronian Glaciation Event.The majority of evidence for appearances of this glaciation event can be related to the Kenorland supercontinent breakup,allied to significant atmospheric change,as well as blooms of biogeochemical oxygenic photosynthesis.In this paper,the Huronian Glaciation Event is constrained to have occurred synchronously during 2.29-2.25 Ga,accompanied by dramatic environmental changes characteristic of the Great Oxidation Event which includes the pre- 2.3 Ga hydrosphere oxidation and the post-2.3 Ga atmosphere oxygenation.展开更多
A large-scale wave of mass protests broke out in fifteen Latin American countries during 2019.Some protests led to the resignation of the president and the collapse of the government.Others caused social unrest and bl...A large-scale wave of mass protests broke out in fifteen Latin American countries during 2019.Some protests led to the resignation of the president and the collapse of the government.Others caused social unrest and bloody conflicts.Some protests led to a national"curfew",and the government was forced to cancel major international conferences.For a time,over ten countries were engaged in turbulent and chaotic activities.Accordingly,the 2019 Latin American protests were also dubbed"Latin America’s Turmoil"by the international media.The scale,scope and impact of the protests have been rarely seen over the last forty years.They constituted part of the global chaos of 2019.The cause was not only the anxious response of the Latin American countries facing global changes not seen for a century,but also a concentrated outbreak of political,economic and social contradictions that has been accumulating in certain Latin American countries over a long period of time.Facing unprecedented global change over a century,the Latin American countries will be able to usher in the"Latin American Spring"only if they carry out profound reform with great courage,and achieve significant progress in their political systems,economic structures,and social security systems.展开更多
LINZHOU City, which was previously called Linxian County in Henan Province, is famous for the Red Flag Canal built in the 1960s. Much has changed since then and the "Spirit of Red Flag Canal" has new meaning...LINZHOU City, which was previously called Linxian County in Henan Province, is famous for the Red Flag Canal built in the 1960s. Much has changed since then and the "Spirit of Red Flag Canal" has new meaning. Pursuing Brighter Prospects Since the Red Flag Canal was built,展开更多
On the afternoon of Nov 26,2016,sad news came from different sources that Fidel Castro,a revolutionary leader of the Cuban people,had passed away.The news came so suddenly that I could hardly believe it.However,this t...On the afternoon of Nov 26,2016,sad news came from different sources that Fidel Castro,a revolutionary leader of the Cuban people,had passed away.The news came so suddenly that I could hardly believe it.However,this time the news was not reported first by the Western media but by Cuban State Television,followed quickly by many Chinese media.I had to accept the heartbreaking truth.展开更多
文摘In November 2016,Donald Trump,the Republican presidential candidate,defeated the highly popular Hillary Clinton,and became president elect of the United States.It is generally believed that Trump’s policies are hard to predict because of his lack of political experiences.The author believes that,it is necessary for the US
基金funded by the National 973-Program(Project Nos.2012CB416602,2006CB403508)National Natural Science Foundation of China(Nos.40352003,40425006,40373007)Frontier Field Project of the State Key Laboratory of Ore Deposit Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences
文摘This paper compiles lithostratigraphic and geochronological data obtained for the Palaeoproterozoic glacial diamictite-bearing successions,and thereby provides insights into understanding the geological processes causing the Huronian Glaciation Event.The majority of evidence for appearances of this glaciation event can be related to the Kenorland supercontinent breakup,allied to significant atmospheric change,as well as blooms of biogeochemical oxygenic photosynthesis.In this paper,the Huronian Glaciation Event is constrained to have occurred synchronously during 2.29-2.25 Ga,accompanied by dramatic environmental changes characteristic of the Great Oxidation Event which includes the pre- 2.3 Ga hydrosphere oxidation and the post-2.3 Ga atmosphere oxygenation.
文摘A large-scale wave of mass protests broke out in fifteen Latin American countries during 2019.Some protests led to the resignation of the president and the collapse of the government.Others caused social unrest and bloody conflicts.Some protests led to a national"curfew",and the government was forced to cancel major international conferences.For a time,over ten countries were engaged in turbulent and chaotic activities.Accordingly,the 2019 Latin American protests were also dubbed"Latin America’s Turmoil"by the international media.The scale,scope and impact of the protests have been rarely seen over the last forty years.They constituted part of the global chaos of 2019.The cause was not only the anxious response of the Latin American countries facing global changes not seen for a century,but also a concentrated outbreak of political,economic and social contradictions that has been accumulating in certain Latin American countries over a long period of time.Facing unprecedented global change over a century,the Latin American countries will be able to usher in the"Latin American Spring"only if they carry out profound reform with great courage,and achieve significant progress in their political systems,economic structures,and social security systems.
文摘LINZHOU City, which was previously called Linxian County in Henan Province, is famous for the Red Flag Canal built in the 1960s. Much has changed since then and the "Spirit of Red Flag Canal" has new meaning. Pursuing Brighter Prospects Since the Red Flag Canal was built,
文摘On the afternoon of Nov 26,2016,sad news came from different sources that Fidel Castro,a revolutionary leader of the Cuban people,had passed away.The news came so suddenly that I could hardly believe it.However,this time the news was not reported first by the Western media but by Cuban State Television,followed quickly by many Chinese media.I had to accept the heartbreaking truth.
