单项选择题

A．More than 500 dollars.
B． A little more than three dollars.
C．Less than three dollars.
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单项选择题
A．To keep the code for its Windows operating system a secret. B．To design some new computer software. C．To persuade more PC users to adopt the Windows operating system.
A．To keep the code for its Windows operating system a secret.
B．To design some new computer software.
C．To persuade more PC users to adopt the Windows operating system.
单项选择题
A．NoB．Yes.C． Not mentioned.
A．No
B．Yes.
C． Not mentioned.
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