电子邮件的地址格式是()。
A. 用户账号．邮件服务器域名
B. 用户账号邮件服务器域名
C. 邮件服务器域名
D. 用户计算机名
The "felt image" is much more important because it helps you to be more confident.
A. True
B. False
Why does the author discuss the principle of persistence of vision in paragraph 1？
A. To introduce a discussion of human vision
B. To explain how we remember images
C. To support the idea that film is an illusion
D. To compare two types of special effects
What did Ed do during vacation？
A. He worked for a radio station.
B. He lived in a dormitory.
C. He took a long trip.
D. He visited the man' s family.
微信支付 
支付宝支付