单项选择题

The application of infrared scanning technolgy to agriculture met with some difficulties due to （）

A．the lack of official support
B．its high cost
C．its failure to help increase production
D．the lack of financial support

<上一题目录下一题>

热门试题

单项选择题

What point is the author making by stating that farmers could carry nearly all their tools on their backs（）

A．Farmers had few tools before the agricultural revolutions.
B．Americans were traditionally self-reliant.
C．life on the farm was extremely difficult.
D．New tools were designed to the portabl

单项选择题

The man leaving college with a trained mind （）

A．is certain to succeed
B．is successful in his studies
C．is considered an educated person
D．can grasp any problem