既能按气相型循环,又能按沉积型循环的元素是__________。

既能按气相型循环,又能按沉积型循环的元素是__________。

查看答案

时间长、范围广、闭合式的循环是(  )

时间长、范围广、闭合式的循环是(  )A.气相型循环 B.生物循环 C.沉积型循环 D.地球化学循环

查看答案

根据短文,回答题The main idea of this passage is to[ A ] describe a

根据短文,回答题The main idea of this passage is to[ A ] describe a woman who suffered f

查看答案

Why do people like to wear T-shirts so much today?

Why do people like to wear T-shirts so much today?A. T-shirts are suitable for h

查看答案

Questionsare based on the following dialogue between two fri

Questionsare based on the following dialogue between two friends talking about c

查看答案