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  3. It is natural that a tree would grow best in a climate with plenty of sunlig

It is natural that a tree would grow best in a climate with plenty of sunlig

游客2023-10-05  43
问题     It is natural that a tree would grow best in a climate with plenty of sunlight and rainfall. It is also expected that little sunlight or rainfall would【B1】______ the growth of a tree. The change from a favorable to an unfavorable【B2】______ can be determined by reading the pattern of rings in a tree trunk (树干). To find out the weather of ten years ago,【B3】______ the rings of a tree trunk from the outside to the inside. If the tenth ring is far from the other rings, then it is 【B4】______ that plenty of sunny and rainy weather occurred. If the rings are【B5】______ together, then the climate was bad for the tree. [br] 【B3】
It is natural that a tree would grow best in a climate with plenty of sunlight and rainfall. It is also expected that little sunlight or rainfall would limit the growth of a tree. The change from a favorable to an unfavorable climate can be determined by reading the pattern of rings in a tree trunk (树干). To find out the weather of ten years ago,count the rings of a tree trunk from the outside to the inside. If the tenth ring is far from the other rings, then it is certain that plenty of sunny and rainy weather occurred. If the rings are close together, then the climate was bad for the tree.
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解析 前文既然提到观察树木年轮的疏密可以了解气候的变化，那么要知道十年前的气候就可以由外向内数十条年轮，所以结合录音填count。
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