仿生是模仿生物的某些结构和功能发明创造各种仪器设备的技术，以下组合中不相匹配的是

A．智能计算机与人脑

B．冷光与萤火虫

C．核潜艇与乌龟背甲

D．雷达与蝙蝠的回声定位

He spent ________ yuan on the new computer.

A．five thousand, three hundred and forty

B．five thousand, three hundred and forties

C．five thousands, three hundred and forty.

D．five thousands, hundreds and forty