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【单选题】
当 LTI 离散系统的激励为单位阶跃序列 时,系统的零状态响应称为( )A.
单位阶跃响应
B.
单位冲激响应
C.
零输入响应
D.
自由响应
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反馈参考答案：
举一反三
【单选题】What's the author's purpose of writing the article?
A.
To persuade people to move to sparsely populated areas.
B.
To prove that Edinburgh is not suitable for people to live in.
C.
To attract government's attention to people's sense of happiness.
D.
To offer readers the information of people's feeling of well-being.
【单选题】What was people's response to Royal Mail's scheme?
A.
It was warmly welcomed.
B.
People could understand the action.
C.
They had some doubt about it.
D.
They were indifferent to such a move.
【单选题】--_____ beautiful music it is! --Yes, ___ it’s very popular among young people.
A.
What a, but
B.
What, so
C.
How a, or
D.
How and
【单选题】What was people's response to Royal Mall's scheme?
A.
It was warmly welcomed.
B.
People could understand the action.
C.
They had some doubt about it.
D.
They were indifferent to such a move.
【简答题】阅读材料,回答下列问题。 材料一改革开放40年来,我国民营企业取得了长足发展,为我国经济发展提供了活力和创造力。目前,民营企业经营状况总体良好,但是在经济下行压力加大、国内外形势复杂多变的背景下,部分民营企业出现了经营不善、融资困难等问题。材料二2018年,从考察东北、回信勉励广大民营企业家,到广东之行,再到中央、民营企业座谈会,在不同场合频繁力挺民营企业发展。强...
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