下列人体血液的成分中,能运输氧的是( )
A:红细胞
B:白细胞
C:血小板
D:血浆
— My computer has gone wrong. It needs _______ soon.— Why not have David _______ it? Nobody can if he can't.
“诗圣”指的是( )
珠江三角洲地区和内地联系的铁路线是( )