B. They have seen the world change.C. Many insects live inside them.(2)Why do redwood trees grow so well?A. They receive a good amount of rain.B. They are in a very hot climate.C. They get a lot of sun. 相关知识点: 试题来源: ...
Tree density is directly correlated to the hardness of the wood and is one main variable in the formula. Hardwood trees will have a higher density because their wood has formed thicker cell walls and is simply denser because of it. Softwoods will have a lower density because their cells have...
aThe distinction between hardwood and softwood is botanical and does not refer to the strength or hardness of the wood. “Hardwood” is a term generally applied to trees that lose their leaves in winter, whereas “softwood” generally describes evergreens such as pine and redwood. It should be...
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