As _________, Benjamin Franklin read a lot of books in polemic divinity.
A. his father was a clergyman
B. his father had a lot of religious books
C. he was fond of religious books
D. he intended to be a clergyman
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What did Johnston, the American musician, ask Midori to do
A. To play the violin once again.
B. To go to the United States.
C. To accept a full scholarship.
D. To make a tape recording.
In the author's opinion, the role played by the family _________.
A. received little attention
B. was insignificant, if compared with the impact of the frontier on cowboys
C. was not so important as the church or the state
D. was overlooked completely
What was NOT the reason that his father made him a printer
A. His brother, as a printer, would take care of him.
B. His father wanted him to give up his longing for sea.
C. His father thought he liked to read books.
D. He liked the printing business better than that of his father's.
微分方程y"=ex通解为( )。
A. ( y＝C1ex+C2x
B. ( y＝C1ex+C2x2+C3
C. ( y＝ex+C1x+C2
D. ( y＝ex+C1x2+C2x+C3
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