农民经常给禾菌松土主要是为了（） A．促进光合作用 B．

搜题请搜索小程序“爱下问搜题”

问题解答题

农民经常给禾菌松土主要是为了（　　）

A．促进光合作用

B．促进呼吸作用

C．抑制呼吸作用

D．抑制光合作用

答案

植物的根呼吸的是空气中的氧气．经常松土，可以使土壤疏松，土壤缝隙中的空气增多，有利于根的呼吸，促进根的生长．

故选：B．

补全对话，情景问答

补全对话。根据下面对话的情景,在空白处填入适当的语句,使对话内容完整。

A:Hello,Lin Tao.

B:Hello,everyone. You are all here. 1.

A:We are planning for a good-bye party , for the 3-year middle school life will be over.

B:That sounds good. Can I join the party?

A:2. Everyone in our class is welcome.

B:Great! Is there anything I can do to help?

A:Let me see. Oh,3.

B:Yes,1 do. I have a digital camera.

A:We want to take some photos. They may remind us of the time we had in middle school in the future. 4.

B:Not at all. I'm sure to bring it to the party. Anything else?

A:Well,would you like to get some fruit and snacks for the party with me?

B:5. .Let's go.

名词解释

肥料