单项选择题

A. Web access.
B. Stronger presence of parents on campus.
C. Offices created to deal with parents’ queries and concerns.
D. E-mail.
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单项选择题
A. They took short, quick steps.B. They were pulled off the treadmill.C. They lost their balance.D. They took longer, coordinated steps.
A. They took short, quick steps.
B. They were pulled off the treadmill.
C. They lost their balance.
D. They took longer, coordinated steps.
填空题
In 2004, Sony launched a new commercial e-reader which was viable and used electronic ink.
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