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[主观题]
组合夹具是由一套完全标准化的元件，根据工件的加工要求拼装成的不同结构和用途的夹具。
提问人：网友shrimp88
发布时间：2022-01-07
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更多“组合夹具是由一套完全标准化的元件，根据工件的加工要求拼装成的…”相关的问题
第4题
预制拼装单元的划分原则______。
A.根据建桥现场实际可能的预制、运输和起重等条件，确定拼装单元的最大尺寸和重量，要便于预制、运输和安装
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B.拼装接头的数量要少，接头要牢固可靠，施工要方便
C.块件的划分应满足受力要求，拼装接头应尽量设置在内力较小处
D.构件的形状和尺寸应力求标准化，增强互换性，构件的种类应尽量减少
第6题
A continuous signal is also called because its waveform is often analogous to that of the physical variable.
A、an analog signal
B、a discrete signal
C、a digital signal
D、a sampled signal
第7题
A system is called linear if it has two mathematical properties: .
A、continuous and shift-invariance
B、shift-invariance and homogeneity
C、additivity and homogeneity
D、additivity and shift-invariance
第8题
Basic circuit theory can be used at .
A、FR/microwave frequency
B、the optical field
C、lower frequency
D、any frequency
第9题
In the analysis and design of communication systems, ______ is particularly important.
A、the characteristics of the physical channels
B、the source output
C、the binary information sequence
D、the amount of redundancy introduced
第10题
In order to form a cluster in a cellular network, cells are generally organized in groups of ______
A、Six
B、seven
C、five
D、eight
