题目内容

Literacy specialists admit that children who read below the level of their fellow pupils are often afraid of reading aloud in a group, often have lower self-confidence, and regard reading as a headache. It is often identified as a mark of an obstacle in learning in quite a few disciplines, which would easily lead to further problems for the children.

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名词解释:确定信号、随机信号、连续时间信号、离散时间信号

分析数字信号处理的优点

构件的强度、刚度、稳定性 。

A. 只与材料的力学性质有关
B. 只与构件的形状尺寸有关
C. 与二者都有关
D. 与二者无关

为保证构件正常工作,构件应具有足够的承载力,故必须满足方面的要求。

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