信任函数又称为()，Bel(A)表示()。

A.A为真

B.对A一无所知

C.对A为真有一定信任

D.A为假

A.全压

B.扬程

C.负压

D.风力

What is the most appropriate title for the passage？

A．Dangers of Earthquake

B．Earthquake Belts and Prediction

C．Earthquake Prediction and Control

D．Earthquake Engineering in California

某连续时间实的因果LTI系统的零、极点如图4-69所示,并己知.其中h(t)为该系统的单位冲激响应.试求:

(1)它是什么类型的系统(全通或最小相移系统),并求h(t)(应为实函数);

(2)写出它的线性实系数微分方程表示;

(3)它的逆系统的单位冲激响应h₁(t),该逆系统是可以实现的(即既因果又稳定)的吗？

A.高压进线

B.进出口喇叭

C.楼梯走道

D.悬吊装置

Copernicus developed his theory______.

A．using various telescopes

B．based on Aristotle's beliefs

C．through observations and reasoning

D．under the encouragement of his friends