单项选择题

A．To remind him of the data he should take to the conference.
B．To see if he is ready for the coming conference.
C．To tell him something about the conference.
D．To help him prepare for the conference.
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According to research, what is the difference between students involved in the community activities and those who are not
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A career that does not require a great deal of math ability would be______.
A．research chemistry
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