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【简答题】
完成项目3数字路的设计。要求:采用双面布线,按照课本上的流程完成整个项目的设计,提交项目文档,包含:原理图,PCB,原理图库文件,封装库文件,网络表和元件报表。
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【单选题】阶跃函数的拉普拉斯变换为( )
A.
1
B.
1/s
C.
1/(s+a)
D.
1/(s+a)^2
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【简答题】对于函数 ,它的拉氏变换的表达式为 。 2 、单位阶跃函数的拉普拉斯变换结果是 。 3 、单位脉冲函数的拉普拉斯变换为 。 4 、 的拉氏变换为 。 5 、 的拉氏变换为 。 6 、若 ,则 = 。 若 L[f(t)]= F(s) ,则 L[f (t-b)]= 、 。 若 L[f(t)]= F(s) ,则 L[f (t-3)]= 、 。
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【单选题】单位阶跃函数的拉普拉斯变换的结果为（ ）
A.
1
B.
1/(s-1)
C.
1/(s+1)
D.
1/s
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【简答题】. Section C Directions: Read the following passage and choose the most suitable heading from A-F for each paragraph.  There is one extra heading which you do not need. （D） A. Promise behaviors B. Atti...
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【简答题】Directions: Read the following passage and choose the most suitable heading from A—F for each paragraph. There is one extra heading which you do not need． A．The results explained why time passes quick...
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【单选题】If you are to choose a title for this passage, which is the most appropriate one?
A.
New bird flu cases found in Shanghai and Bangkok.
B.
Bird flu disease jumped from chicken to human.
C.
Farms are quarantined to stop the bird flu from spreading.
D.
China and Thailand fight against new outbreak of bird flu.
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【单选题】Which one do you choose as the best title for this passage?
A.
Money and Its Uses
B.
Different Things Used as Money
C.
Different Countries, Different Money
D.
The History of Money
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【简答题】Directions: Read the following passage and choose the most suitable heading from A-F for each paragraph. There is one extra heading which you do not need. A. Illegal hunting has caused a decrease in t...
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【简答题】Section C Directions: Read the following passage and choose the most suitable heading from A-F for each paragraph.  There is one extra heading which you do not need. （D） A. Value of rare skills B. Dan...
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【简答题】Complete the table below. Choose ONE WORD ONLY from the passage for each answer. Write your answers in boxes 17-19 on your answer sheet. (17)
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【单选题】阶跃函数的拉普拉斯变换为( )
A.
1
B.
1/s
C.
1/(s+a)
D.
1/(s+a)^2
查看完整题目与答案
【简答题】对于函数 ,它的拉氏变换的表达式为 。 2 、单位阶跃函数的拉普拉斯变换结果是 。 3 、单位脉冲函数的拉普拉斯变换为 。 4 、 的拉氏变换为 。 5 、 的拉氏变换为 。 6 、若 ,则 = 。 若 L[f(t)]= F(s) ,则 L[f (t-b)]= 、 。 若 L[f(t)]= F(s) ,则 L[f (t-3)]= 、 。
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【单选题】单位阶跃函数的拉普拉斯变换的结果为（ ）
A.
1
B.
1/(s-1)
C.
1/(s+1)
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【简答题】. Section C Directions: Read the following passage and choose the most suitable heading from A-F for each paragraph.  There is one extra heading which you do not need. （D） A. Promise behaviors B. Atti...
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【简答题】Directions: Read the following passage and choose the most suitable heading from A—F for each paragraph. There is one extra heading which you do not need． A．The results explained why time passes quick...
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【单选题】If you are to choose a title for this passage, which is the most appropriate one?
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New bird flu cases found in Shanghai and Bangkok.
B.
Bird flu disease jumped from chicken to human.
C.
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D.
China and Thailand fight against new outbreak of bird flu.
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【单选题】Which one do you choose as the best title for this passage?
A.
Money and Its Uses
B.
Different Things Used as Money
C.
Different Countries, Different Money
D.
The History of Money
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【简答题】Directions: Read the following passage and choose the most suitable heading from A-F for each paragraph. There is one extra heading which you do not need. A. Illegal hunting has caused a decrease in t...
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【简答题】Section C Directions: Read the following passage and choose the most suitable heading from A-F for each paragraph.  There is one extra heading which you do not need. （D） A. Value of rare skills B. Dan...
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【简答题】Complete the table below. Choose ONE WORD ONLY from the passage for each answer. Write your answers in boxes 17-19 on your answer sheet. (17)
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