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【单选题】
下列关于B细胞描述错误的是A.
B细胞在骨髓中发育至成熟阶段后进入脾脏
B.
B细胞激活后成为效应B细胞和记忆B细胞。
C.
没有 被激活的 成熟B细胞 被称为幼稚B细胞（naïve B cell）。
D.
浆细胞来自B细胞
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反馈参考答案：
举一反三
【简答题】“开始”菜单的选项中如果右边有黑色三角形表示该项有下级菜单。 （ ）
【单选题】Executive support systems are information systems that support the
A.
day-to-day processes of production.
B.
knowledge and data workers in an organization.
C.
long-range planning activities of senior management.
D.
decision-making and administrative activities of middle managers.
【单选题】Executive support systems are information systems that support the
A.
long-range planning activities of senior management.
B.
knowledge and data workers in an organization.
C.
decision-making and administrative activities of middle managers.
D.
day-to-day processes of production.
参考解析：
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