听录音,回答以下问题。
What is the main problem caused by the usual way of plowing?
A.The crop' s blooming period is delayed. B.The roots of crops are cut off. C.The topsoil is seriously damaged. D.The growth of weeds is accelerated.
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答案解析:
听录音,回答以下问题。What does the man think of the government' s pre
听录音,回答以下问题。What does the man think of the government' s present proposal about