题目

Many writers are drawn to building a world, _____ readers are somewhat familiar with but also feel distant from our normal lives. A . it B . one C . that D . the one 答案：B分布在第三级阶梯上的主要地形类型是（ ）A.丘陵和平原 B.丘陵和盆地C.山地和高原 D.平原和高原