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【单选题】
当PH>PI时,氨基酸主要以什么离子存在A.
阴离子
B.
阳离子
C.
两性离子
D.
中性离子
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举一反三
【简答题】听短文，判断下列句子的正(T)误(F)。 ( ) 1. The girl want to go to a supermarket. ( ) 2. The library is far from here. ( ) 3. The supermarket is next to a library. ( ) 4. The library isn't on Green St...
【简答题】He likes drawing at times when he isn’t working .
【单选题】A. He is good at drawing pictures. B. He likes paintings very much.###SX
A.
He is good at drawing pictures.
B.
He likes paintings very much.
C.
He likes visiting the art museum very much.
D.
He thinks the art museum is a very quiet place.
【简答题】Though he likes drawing, his parents don’t allow him to learn it. →He likes drawing, ____________ his parents don’t allow him to learn it. →He likes drawing, ____________ , his parents don’t allow him...
【简答题】A．He is good at drawing pictures. B．He likes pictures very much. C．He likes visiting the art museum very much. D．He thinks the art museum is a very quiet place.
【简答题】听录音，判断下列图片正(T)误(F)。 1. 2. 3. 4. ( ) ( ) ( ) ( )
【简答题】听音，判断正(T)误(F)。 1. 2. 3. 4. ( ) ( ) ( ) ( )
【简答题】看图，听句子，判断正(T)误(F)。 1. ( ) 2. ( ) 3. ( ) 4. ( )
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