【简答题】The farmer can continue to support himself and his family only if he produces a surplus. B)只有生产更多的农作物,农民才能养活自己和家人。 C)只有当拥有盈余时,农民才能持续地供养自己和家人。 D)农民生产有剩余,只有这样,他才能养活自己和家人。
【单选题】A Chinese farmer has developed an effective rat poison with a strong, sweet smell that can make rats come out of their holes from 500 metres away to eat it even in day light. Rats can not resist the t...