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问题 单项选择题

图所示结构中（）。

A. MCD=0，CD杆只受轴力

B. MCD≠0，外侧受拉

C. MCD≠0，内侧受拉

D. MCD=0，NCD=0

答案

参考答案：D

解析：

本题CD部分为附属部分，在题示荷载作用下，CD部分不受力。

填空题

脂多糖由（）、（）和O-特异侧链三部分组成，而糖被的主要成份是多糖、多肽或（），尤以多糖为主。
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单项选择题

A management domain typically contains a large amount of management information. Each individual item of（）information is an instance of a managed object type. The definition of a related set of managed（）types is contained in a Management Information Base (MIB) module. Many such MIB modules are defineD. For each managed object type it describes, a MIB（）defines not only the semantics and syntax of that managed object type, but also the method of identifying an individual instance so that multiple（）of the same managed object type can be distinguisheD. Typically, there are many instances of each managed object（）within a management domain.

The definition of a related set of managed（）types is contained in a Management Information Base (MIB) module.

A．path

B．object

C．route

D．packet
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