- 搜标题
- 搜题干
- 搜选项
单项选择题
对所选的实体（组或组件）加一个“外壳”，使其合并成一个实体并删除内部所有图元的是
对所选的实体（组或组件）加一个“外壳”，使其合并成一个实体并删除内部所有图元的是
A、 实体外壳
B、相交
C、联合
D、剪辑
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问答题
Listen to the news on a disaster and try to answer the following questions.
Listen to the news on a disaster and try to answer the following questions.
1. What happened?
________________________________________________________
2. When and where did it happen?
________________________________________________________
3. What has been affected?
________________________________________________________
4. How many people suffered from the disaster?
________________________________________________________
答案：
A typhoon has brought down trees and flooded streets in Mani...
