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【单选题】
用 KIO 3 标定 Na 2 S 2 O 3 所涉及的反应是 IO 3 - +5I - +6H + =3I 2 +3H 2 O I 2 +2S 2 O 3 2- =2I - +S 4 O 6 2- 在此标定中 n (KIO 3 ) : n (S 2 O 3 2- ) 为A.
1:1
B.
1:2
C.
1:5
D.
1:6
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【单选题】I don't know ____. Can you help me? [ ]
A.
what does the word mean
B.
what the word mean
C.
what the word means
D.
how the word means
【单选题】What does the author think of those single people?
A.
They are using excuses to cheat themselves.
B.
They should be sorry for being single.
C.
They don't like weddings, because they are expensive.
D.
They reject staying in a comfortable home with a beautiful bride.
【简答题】what does “single up forward to breast line and spring” mean?
【简答题】What does the word 'hotchpotch' mean?
【简答题】What does the word 'computers' originally mean according to the passage?
【单选题】What does the word 'defensive' mean in the passage? 查看材料
A.
易怒的
B.
攻击性的
C.
外向的
D.
有戒心的
【单选题】I don’t know ____________．
A.
what does the word mean
B.
what the word mean
C.
what the word means
D.
how the word means
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