题目

A: Did you solve problem you were discussing at the meeting? B: No, we didn't. It was difficult problem we had never met. A . the, the B . a, a C . the, a 答案：C下列地区和种植的农作物的搭配中，符合“因地制宜”发展原则的是（ ）A. 青藏高原青棵、小麦、水稻 B. 东北平原大豆、小麦、油菜C. 华北平原玉米、苹果、甘蔗 D. 长江中下游平原水稻、甘蔗、油菜