单项选择题

Farmers can save a considerable amount of pesticide by （）

A．transforming poisoned rain
B．consulting infrared scanning experts
C．resorting to spot-spraying
D．detecting crop problems at an early date

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热门试题

单项选择题

The author emphasizes that many of the facts you acquire by hard study （）

A．deal with rules of health
B．will be forgotten
C．are of no value
D．will be very useful

单项选择题

A primary nurse can propose a different approach of treatment when （）

A．the present one is refused by the patient
B．the patient complains about the present one
C．the present one proves to be ineffective
D．the patient is found unwilling to cooperate