单项选择题

燃烧学的发展经历了一段相当长的曲折过程，下列（）不是燃烧学说。

A．燃烧素学说
B．氧学说
C．燃烧化学反应学说
D．分子碰撞学说

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男孩，3岁，自幼人工喂养，食欲极差，有时腹泻。身高85cm，体重7500g。皮肤干燥、苍白，腹部皮下脂肪厚度约0.3cm。脉搏缓慢，心音较低钝。其主要诊断应是( )。A.先天性甲状腺功能减低症B.营养性贫血C.婴幼儿腹泻D.营养不良E.心功能不全

A.3cm。脉搏缓慢，心音较低钝。
其主要诊断应是(
B.先天性甲状腺功能减低症
B.营养性贫血
C.婴幼儿腹泻
D.营养不良
E.心功能不全

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The discussion of the regional bank (line 13-24) serves which of the following functions within the passage as a whole?A.It describes an exceptional case in which investment in service actually failed to produce a competitive advantagE.B.It illustrates the pitfalls of choosing to invest in service at a time when investment is needed more urgently in another areA.C.It demonstrates the kind of analysis that managers apply when they choose one kind of service investment over anotherD.It supports the argument that investments in certain aspects of service are more advantageous than investments in other aspects of servicE.E.It provides an example of the point about investment in service made in the first paragraph.

A.It
B.
B.It
C.
C.It
D.It
E.
E.It
F.

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