Ladies and gentlemen, please fasten your seat belts. The plane _________. A. takes off B. took off C. has taken off D. is taking off 答案:D18、读我国某区域河流和城市分布示意图,回答下列题。
20070312
长江流域棉区、黄淮海棉区、南疆棉区是我国主要产棉区。随着近几年棉价上涨,粮棉争地是目前我国农作物布局中的突出矛盾之一,为缓解争地矛盾,今后我国棉花生产的重点区域应放在( )
A.江汉棉区 B.南疆棉区
C.冀鲁豫棉区 D.江淮棉区