土地利用的社会效益
参考答案：
土地利用后果对社会需求的满足程度及其相应产生的政治和社会影响。
---Does China have cultural relics?
--- Yes, it is admitted that many cultural relics in the world, such as the Great Wall, the Potala Palace, the Magao Caves and so on, ______ China.
A．belongs to
B．are belonging to
C．belonged to
D．belong to
超声波的波型有哪几种？
