試卷：無年度 - 2000年1月托福閱讀#20905
| 科目：TOEFL(Test of English as a Foreign Language)托福
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試卷名稱：無年度 - 2000年1月托福閱讀#20905
科目：TOEFL(Test of English as a Foreign Language)托福
23. What does the passage mainly discuss?
(A) Characteristics of high quality soil
(B) Particles typically found in most soils
(C) How a high clay content affects the
texture of soil
(D) Ways to determine the texture of soil
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