A:consider to go
B:to consider to go
C:consider going
D:considering going
南美洲被称为“世界人种大熔炉”,关于南美洲人种的叙述正确的是( )
We brush our teeth and have a bath (洗澡)in this room. It's a____.
小阳发现电线杆AB的影子落在土坡的破面CD和地面BC上,量得CD=8米,BC=20米,CD与地面成30º 角,且此时测得1米杆的影长为2米,则 电线杆的高度为( )