多项选择题

关于肩胛骨的描述，正确的有( )
A.是三角形的扁骨 B.前面紧贴第二至第七肋骨
C.肩峰为最向外突出的部分 D.喙突与肱骨头相关节
E.喙突与肩胛冈相连

A.是三角形的扁骨
B.前面紧贴第二至第七肋骨
C.肩峰为最向外突出的部分
D.喙突与肱骨头相关节

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问答题

阅读以下内容，判断材料的种类（用中文写出）。（）Metallic materials are normally combinations of metallic elements. They have large numbers of nonlocalized electrons, that is, these electrons are not bound to particular atoms. Many propertics of metals are directly attributable to these electrons. Metals are extremely good conductors: of electricity and are not transparent to visible light: a polished metal surface has a lustrous appearance Furthermore, metals arquite strong, yet deformable, which accounts for their extensive use in structural applications.

单项选择题

泄殖腔周围有粪污，说明（） A. 腹泻 B. 便秘 C. 正常 D. 缺水

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