题目内容
(请给出正确答案)
[主观题]
Farmers can save a considerable amount of pesticide by_____.A.resorting to spot-sprayingB.
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 at an early stage
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