在栅格数据获取过程中，为减少信息损失提高精度的方法是?
A. 增大栅格单元面积
B. 缩小栅格单元面积
C. 改变栅格形状
D. 减少栅格总数
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河流周围保护区的定界可采用哪种方法？
A. 空间聚类
B. 统计分析
C. 叠置分析
D. 缓冲区分析
下列哪些属于矢量数据的分析方法？
A. 坡向分析
B. 谷脊特征分析
C. 网络分析
D. 地形剖面分析
In China, if the host keeps on apologizing for the homely dishes, he/she ____
A. is showing their respect to the guest.
B. is explaining why the dishes are not good enough.
C. is inviting the guests to praise him/her for their hospitality.
Why do the Chinese regard themselves as decedents of Yan and Huang? ______
A. Because Yan and Huang are the first human beings
Because Yan and Huang fought a great battle
C. Because Yan and Huang were the leaders of two great tribes
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