-Which would you like, a cup of tea or a glass of milk?- ______. I think I'll just have a glass of water.
A: Both
B:Neither
C:None
D:Either
5+____=11
4+____=13
如图,一根铁管CD固定在墙角,若BC=5米,∠BCD=55°,则铁管CD的长为()
(○代表神经元细胞体,<代表神经末梢,且ab=bc、ac=de)
如果转动目镜和移动装片时,视野内的污点始终不动,则污点可能在( )