国际标准是一种技术文献,能反映世界农业生产和管理水平,该功能反映的是国际标准的()
A.技术价值
B.经济效果
C.贸易依据
D.法规属性
参考答案:A
根据课文,按顺序排列句子。
( ) Then we put Christmas things on the tree.
( ) Now let's put our gifts under the tree.
( ) Let's invite Danny to help us put up the tree.
( ) First, we put on the lights.
( ) The star always goes on top!
( ) There! It's done! It's beautiful!
简述民居和村落选址强调“山南水北”的科学道理。