Soil age refers to the length of time for soil development. Soil age is usually divided into absolute age and relative age.
举一反三
- Soil fertility is soil productivity, which refers to the ability of soil to produce plant products.
- 中国大学MOOC: There are several different ages of man in these stories, including the Golden Age, the Silver Age, the Iron Age the Wooden Age.
- The Age of ______ mainly covers the first half of the 18th century and it is the peak of the Neoclassical Age and thus we sometimes call it the “Golden Age” or the “Augustan Age.”
- 下面哪一个表达式能正确表示逻辑关系："age≥18 或age≤60"？ A: age>=18 || age B: age>=18 or age C: age>=18 | age D: age>=18 && age
- 表达式“AGE BETWEEN 18 AND 24”等价于 A: AGE>18 AND AGE<24 B: AGE>=18 AND AGE<24 C: AGE>18 AND AGE<=24 D: AGE>=18 AND AGE<=24