参观沈阳世博园的同学对几株上面结满了巨大番茄的“番茄树”啧啧称奇，这些“番茄树”不是种植在土壤里，而是种植在富含营养液的水箱里。采用的这项生物技术是 [ ]

A．组织培养

B．无土栽培   

C．使果实、种子提早成熟

D．使细胞加速分裂和生长

–Your mother’s never seen a 3D film at the cinema, has she?

--____, but only once.

A．Yes, she has

B．No, she hasn’t

C．Yes, she is

D．No, she isn’t