题目内容
协调西北地区发展和环境之间关系的途径有
①增加移民②控制人口数量③扩大耕地面积④保育天然植被
①增加移民②控制人口数量③扩大耕地面积④保育天然植被
[ ]
A、①②
B、②③
C、③④
D、②④
B、②③
C、③④
D、②④
D
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