皮皮学,免费搜题
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【单选题】
沙门菌属分类的主要依据是()
A.
毒素类型
B.
染色性
C.
溶血现象
D.
生化反应
E.
抗原构造
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A.
either
B.
both
C.
none
D.
neither
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A.
正确
B.
错误
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A.
意念
B.
意义
C.
意境
D.
意象
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A.
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B.
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A.
IL-2主要由T细胞产生
B.
IL-2主要由B细胞产生
C.
IL-2主要刺激8细胞生长
D.
IL-2分子量为20kD,含155个氨基酸
E.
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