A：
B：
中国古代的自然经济（ ）
①是中国传统社会赖以存在的基础
②是以满足生产者本身或本经济单位需要进行生产的经济
③农业与家庭手工业相结合
④带有开放性
End of Term Report
Student's name
Zhang Xing
Subject
English
Teacher
Mr. Dickens
At the beginning of this term
He found that studying English was very ____
In writing
His ____is better.
In speaking
He can have English ____with his friends and with me.
He can answer my questions in English____.
Next term
If he ____like this, he will do much better.
如图甲为杨树叶片进出气体情况示意图，乙为杨树在夏季晴朗天气中一天内某些生理过程的变化曲线图，丙、丁分别为杨树叶片和根尖结构示意图，请据图分析回答下列问题：
