题目内容

____用于评价系统的输出信号和输入信号之间的因果性。

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利用系统输入x(t)与输出y(t)的自功率谱密度函数,可求该系统的频率响应函数。( )

A. 对
B. 错

相关滤波器的基本原理是什么?举例说明其工程应用。

The following are the manifestations of hypermetabolic syndrome in hyperthyroid patients

A. Increased nerve excitability
B. Goiter
C. Be afraid of heat and sweat
D. Exophthalmos
E. Tachycardia

Glycosylated hemoglobin determination can reflect the patient's average blood glucose level in a period of time before blood collection, which is

A. 4 ~ 8 weeks
B. 8 ~ 12 weeks
C. 12 ~ 16 weeks
D. 16 ~ 20 weeks
E. 20 ~ 24 weeks