单项选择题

Which of the following is a better title for the passage above ______

A．The Birth of Numbers
B．The Idea of Zero
C．The Use of the Abacus
D．Early Computing Ideas and Devices
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单项选择题
A．The date when the Civil War ended.B．The date when the first exam will take place.C．The date when the paper is due.D．The date when Abraham Lincoln died.
A．The date when the Civil War ended.
B．The date when the first exam will take place.
C．The date when the paper is due.
D．The date when Abraham Lincoln died.
问答题
1. Present state.2. Reasons.3. My comments.
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