单项选择题
What is Jason Ohler's attitude towards e-books
A．Positive.
B．Indifferent.
C．Cautious.
D．Suspicious.
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单项选择题
What is the author's purpose of writing the passage
A．Draw people's attention to the disadvantages of e-books.
B．Call on people to reject e-books.
C．Criticize schools and business that don't provide e-books.
D．Encourage people to use e-books.
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单项选择题
In what sense do e-books exert a negative impact on the environment
A．They are unable to be broken down into harmless products.
B．They consume a lot of natural resources.
C．They produce harmful gases.
D．They are capable of being reused.
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