The basketball game was invented by a Canadian doctor James Naismith.
A:was called
B:to call
C:named
D:calling
下列有关全球变暖造成的影响及其对策的叙述,正确的是( )
下图反映的是新中国在20世纪五六十年代的农业经济发展状况,出现图中B点到C 点这一变化的主要原因是( )