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【简答题】
用NaOH滴定醋酸和硼酸的混合液时会出现( ) 个突跃。 A. 2
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举一反三
【单选题】When a new word is formed from an old one ______.
A.
the original meaning of the old dies out
B.
it is hard to know the secret of the development of the word
C.
the new word carries with itself some of the original meaning
D.
the meaning of the new word is often confusing
【单选题】How do you rename file "new" in file "old"?
A.
mv new old
B.
cp new old
C.
ren new old
D.
r rn new old
【单选题】How do you rename file “new” to file “old”?
A.
move new old
B.
mv new old
C.
cp new old
D.
rn new old
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