I saw the doctor_____ in the city of Shanghai last year. Maybe he comes from Shanghai.
A:anywhere
B:everywhere
C:here and there
D:somewhere
东侧是东半球,西侧是西半球,北侧是寒带,南侧是温带,该点地理坐标是( )
将白鼠胚胎的细胞核移入灰鼠的去核卵内,在体外发育成胚胎,再植入黑鼠的子宫内继续发育,所产下的小鼠的毛色为( )