单项选择题

In "Many of these books and articles present the theoretical and empirical aspects of the interview as well as the training of the interviewers.", "empirical" here can be substituted by______.

A．realistic
B．experienced
C．practical
D．systematic
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单项选择题
I ______with thanks the help of my colleagues in the preparation of this new column.
A．express
B．confess
C．verify
D．acknowledge
单项选择题
After performing a successful operation, the doctor at last pulled the patient______.
A．back
B．in
C．up
D．through
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