Yuan Longping grows 61 is called super hybrid rice. This special strain of rice makes it possible 62 (produce) 20% more of the crop in the same fields. Born in 1930, Yuan graduated from Southwest Agricultural College in 1953. Since then, finding ways to grow more rice 63 (be) his life goal. As a young man, he saw the great need for increasing the output. At that time, hunger was a 64 (disturb) problem. Yuan searched for a way to increase rice harvests 65 expanding the area of the fields. In 1950, Chinese f图中是我国四大地理区域的代表景观.据此回答问题.1.春天在北方的平原地区,常见的景观是( )A.甲 B.乙 C.丙 D.丁2.关于四大地理区域的叙述,正确的是( )A.甲区域自东向西降水逐渐减少,自然景观变化规律是:荒漠→荒漠草原→草原B.乙区域种植的主要糖料作物是甘蔗C.丙区域雪山连绵,主要特征是高寒D.丁区域优势能源是煤炭和石油