单项选择题

What is the main difference between an electronic book and a LCD screen

A．The power they need.
B．The portability they come to.
C．The convenience they make.
D．The content they stor
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单项选择题
According to the passage, which book is the only book you'll ever need
A．The Bible.
B．A single volume.
C．New Age tome.
D．An electronic book.
单项选择题
What is the premise behind a project of the Massachusetts Institute of Technology
A．Electronic ink.
B．Electronic book.
C．Laptop.
D．LCD screen.
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