题目内容

One advantage of nano-armed washing machines is that______.

A. one wash-load could be much larger than before
B. the clean-up is done with an additional benefit
C. cleaning powder is no longer necessary
D. a lot of water could be saved

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【C5】

A. do
B. make
C. have
D. get

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

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