A：土壤疏松可以促进植物根的光合作用
B：土壤疏松可以促进植物根的呼吸作用
C：土壤疏松可以保住土壤中的无机盐
D：锄去了杂草，农作物自然能长好
温室气体使全球气候变暖的最主要原因是（ ）
读短文，回答问题。
May: Good morning! Can I help you?
Lucy: Yes. I want some pencils and pens.
May: We have many here. Which one do you like?
Lucy: That red one, please.
May: Here you are.
Lucy: Thank you. How much is it?
May: It's cheap. It's 1 yuan.
能否把“悠然见南山”中的“见”字改为“望”字？为什么？
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