问题
选择题
For areas that receive regular and plentiful rainfall, such detailed crop monitoring（监测）might not be useful or ;
A．economy
B．economic
C．economical
D．economics
答案
答案：C
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For areas that receive regular and plentiful rainfall, such detailed crop monitoring（监测）might not be useful or ;
A．economy
B．economic
C．economical
D．economics
答案：C
