苏东坡在词中写道:“我欲乘风归去,又恐琼楼玉宇,高处不胜寒”,这其中包含的地理原理是[ ]
A、地势高,气温低
B、纬度高,气温低
C、地势低,气温低
D、纬度低,气温低
答案:A
— Excuse me, where's the West Hill Farm, please?
— Go the forest and the foot of the mountain you will find it. [ ]
A. through, at
B. across, at
C. through, under
D. past, under
数据库安全性的含义是什么?与完整性有何不同?