短剪枝条剪口处的芽叫剪口芽，应选饱满的壮芽留下。
参考答案：对
根据句意及首字母提示补全单词。
1. W_____ is your mother's birthday.
2. Christmas(圣诞节) is in D_____.
3. September t_____ is Teachers' Day.
4. My b_____ is October 21st.
5. Dave had a birthday p_____ yesterday.
文化产品扩散通路结构的选择牵涉三个方面的问题：（）、（）与扩散成本。
