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下列具有同源染色体的细胞是
A.肝细胞B.卵细胞
C.次级精母细胞D.细菌

用所给词组的适当形式填空。(5分)
be able to     hear of     keep…down    fall in love     pick up
【小题1】Have you ever __________ __________ Donald Duck?
【小题2】She’s doing her homework. Would you mind _________ your voice_________?
【小题3】We often see the boy __________ __________ the litter in the school yard.
【小题4】He _________ __________ __________ drive a car when he was 18.
【小题5】Last summer Lisa went to Guilin. She __________ __________ __________ with it.
A
【小题1】heard of  
【小题1】keeping down  
【小题1】pick up     
【小题1】 was able to  
【小题1】fell in love解析:
略略
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