农业土地适度经营规模的特性包括（）。
A、地区性
B、动态性
C、层次性
D、适应性
E、经济性
参考答案：A, B, C, D
—Is the flower beautiful?
—Yes, at _____ it's _____ the one you bought for me. [ ]
A. last; as bad as
B. least; no better than
C. last; not better
D. least; no worse than
未成熟儿颅内侧脑室前角内出现回声带是颅内出血的表现。
