电视纪录片《第三极》首次聚焦青藏高原,与南北两极比较,它是唯一有着人类生存活动的“极地”地带.读图,到拉萨可拍摄到的景观是( )
A:
B:
C:
D:
-What colour are they?-They're ____.
With the development of modern industry, there will be ___ living space for wild animals.
如图所示人类认识地球形状的先后过程是( )