原式=1-112+2×12
=1-2+1
=0．
美国的土著居民属于 [ ]
A、白种人
B、黑种人
C、黄种人
D、混血种人
--- Does it rain a lot in this area?
--- , it hardly ever rains; the climate is like that of a desert.
A．What’s more
B．In other words
C．On the contrary
D．As a result
