单项选择题

Agricultural pests are______.

A．rapidly being destroyed by chemical poisons
B．killed by pesticides
C．dangerous to farmers, scientists, and food planners
D．bec0ming used to poisons
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单项选择题
IPM is a plan that______.
A．uses the pests' natural enemies
B．controls the pests' breeding environment
C．develops stronger strains of seeds
D．does all of the above
单项选择题
UNEP has found______.
A．182 resistant pests
B．223 resistant pests
C．228 resistant pests
D．364 resistant pests
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