A:平原
B:山区
C:盆地
D:高原
利用紫色洋葱外表皮细胞和不同浓度的蔗糖溶液以及清水进行渗透实验,下列有关该实验的叙述正确的是( )
Bach died in 1750, but it was not until the early 19th century____ his musical gift was fully recognized.