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证明： sin2α+1 1+cos2α+sin2α = 1 2 tanα+ 1 2 ．
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举一反三
【单选题】The _____________ we do our homework, the __________ mistakes we will make
A.
more careful, less
B.
more carefully, less
C.
more carefully, fewer
D.
more careful, fewer
【简答题】(十二)( )是实现富国和强军相统一的重要政治保障,是我党我军特有的政治优势。A. 军政配合 B. 军民团结 C. 军政军民团结 D.
【单选题】We all _______ him to do more exercises, but he wouldn’t listen.
A.
suggested
B.
advised
C.
considered
D.
Promised
【单选题】To make our neighborhood more beautiful, we needn‘t do much more than make a little___in our daily life.
A.
option
B.
goodness
C.
thing
D.
change
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