At the railway station, the mother waved goodbye to her daughter until the train was _______.

A．out f sight

B．out f reach

C．out f order

D．out f place

国家“十一五”科学技术发展规划提出，“十一五”期间，科技进步对经济增长的贡献率要达到45%以上，对外技术依存度要降到( )以下。

A．30%

B．35%

C．40%

D．45%