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【单选题】
脊髓灰质炎病毒感染人体后，绝大多数为隐性感染，发展成麻痹的百分率约为A.
1%或更少
B.
2%或更少
C.
3%或更少
D.
4%或更少
E.
5%或更少
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【简答题】早期肺癌的特征性症状是( ) A发热 B血丝痰 C哮鸣 D气促
【单选题】Every child should have an older brother he can look up to. I feel sorry for those kids or children who don't care for their older brothers as I do mine. A boy requires understanding, protection, and ...
A.
a good background in education
B.
a patient and understanding attitude
C.
a deep concern for his brother’s future
D.
a lack of friends and social life
【单选题】Every child should have an older brother he can look up to. I feel sorry for those kids or children who don't care for their older brothers as I do mine. A boy requires understanding, protection, and ...
A.
He was fair but demanding.
B.
He was dull and silent.
C.
He was quiet and soft-hearted.
D.
He was reliable and helpful.
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