问题
单项选择题
对于组织来说，连续性包括三个层次：结构的连续性、存在的连续性和（）
A.基础的连续性
B.速度的连续性
C.感觉的连续性
D.功能的连续性
答案
参考答案：D
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对于组织来说，连续性包括三个层次：结构的连续性、存在的连续性和（）
A.基础的连续性
B.速度的连续性
C.感觉的连续性
D.功能的连续性
参考答案：D
We know that trees are useful in our everyday life. They 1 us many things, such as wood, oxygen(氧气), rubber, medicines and many other things. They can 2 tell us a lot about our climate. The following are the reasons. If you cut across a tree, you can 3 that it has many rings. Most trees grow one 4 ring every year. Because of this reason, we know 5 a tree is. A tree over a hundred years old means that it has more than a hundred 6 . When the climate is dry(干燥的) or very cold, the trees do not grow very much and their rings are usually 7 . When it is wet and 8 , the rings are much thicker. If the rings are suddenly very thin or suddenly very thick, this means that the 9 changed suddenly. If we look at the rings on the trees, we can 10 about the climate for a hundred years. We can see how our climate is changing today.
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