单项选择题

Farmers can save a considerable amount of pesticide by ______.

A．resorting to spot-spraying
B．consulting infrared scanning experts
C．transforming poisoned rain
D．detecting crop problems a[ an early date
<上一题 目录 下一题>
热门 试题

单项选择题
In order to apply pesticide spraying precisely, we can use infrared scanning to ______.
A．estimate the damage to the crops
B．draw a color-coded map
C．measure the size of the affected area
D．locate the problem area
单项选择题
To understand what true happiness is, one must ______.
A．have as much fun as possible during one's lifetime
B．make every effort to liberate oneself from pain
C．put up with pain under all circumstances
D．be able to distinguish happiness from fun
相关试题