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【简答题】
原子发射光谱中目前最常用的光源是( )
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举一反三
【单选题】What does the author conclude.
A.
He is better than his wife at taking care of children.
B.
A child prefers to stay with his/her father.
C.
A man can take good care of children if he gets the experience.
D.
A child prefers to stay with his/her mother.
【单选题】40 What does the author conclude? A He is better than his wife at taking care of children.
B.
A child prefers to stay with his/her father.
C.
A man can take good care of children if he gets the experience
D.
A child prefers to stay with his/her mother.
【单选题】He is taller than his elder brother. [ ]
A.
plenty of
B.
a lot of
C.
a lot
D.
a bit of
【简答题】句型转换。 1. He is much taller than his brother.(改为同义句) He is taller_____ _____than his brother. 2. They often come here now.(改为否定句) They_____come here_____. 3. She felt so tired that she couldn't walk fo...
【简答题】判断下列式子是否可用平方差公式 (1)(a+2b)(-a-2b ) ( ) (2) (a-2b)(2b-a) ( ) (3) (2a+b)(b+2a) ( ) (4)- (a-3b)(a+3b) ( ) (5)(-2x+3y)(3y-2x)( )
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