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2道语法题请教![讨论][求助]
有点搞不懂 还望大虾指教!! 谢谢!
1. Dating from around A.D 1000, the largest mound surviving from the Missippia culture was one hundred foot high and had a base of nearly fifteen acres.
A): C WHY NOT A
2. The particles in a clay soil are so fine that it tends to be compact and interferes with the oxygen supply for plant roots.
A): A WHY NOT C |
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