读我国地形剖面图填空．

此剖面图是沿着　____ 　（甲、乙、丙、丁）线做的，图中的B是　____ 　平原，甲线经过的区域属于　____ 　（干湿地区）和　____ 　（中国的温度带）．A山脉是我国地势　____ 　 级和　____ 　级阶梯的分界线．

Much to our shock, none of the 100 people were able to________the gas blast, which brought great grief to their family.

下列不属于元朝采取的发展农业生产的措施的是（   ）