A:although that
B:no matter how
C:whatever
D:however
分析下列图形回答有关问题:
(1)图中A是____ ,B是____ ,D是____ .
(2)如果DNA换成RNA,则A是____ ,B是____,D是____.
It's black and white.
已知甲地海拔为2000米,乙地与甲地的相对高度为1000米,则乙地的海拔为( )