先天性心脏病有蹲踞、发绀现象的是
A．动脉导管未闭B．房间隔缺损C．肺动脉狭窄D．法洛四联症E．室间隔缺损
参考答案：D
读一读，想一想，判断对(√)错(×)。
Hello, I'm Xiaoyong. I'm 8 years old. My favourite colour is red. I have a red bag. My favourite toy is a
ship. It's blue. My favourite friend is Tom. He is a baby now. Haha.
( ) 1. Xiayong is 9 years old.
( ) 2. Xiaoyong's favourite colour is red.
( ) 3. The bag is blue.
( ) 4. Xiaoyong's favourite toy is Tom.
( ) 5. Tom is a baby now.
怎样将AutoCAD图形制作成单独的图片？简述相关操作。
