设A=ξηT，ξ=[1，-2，1]T，η[2，1，1]T，则(E+A)n=______．

设α1=[1，0，-1，2]T，α2=[2，-1，-2，6]T，α3=[3，1，t，4]T，β=[4，-1，-5，10]T，已知β不能由α1，α2，α3线性表出，则t=_______

已知系统的零输入响应yzi(t)=[e^(-t)+e^(-2t)]ε(t);零状态响应yzs(t)=[4e^(-t)+5e^(-2t)+10e^(-5t)]ε(t)。全响应y(t)=[(空1)e^(-t)+(空1)e^(-2t)+(空1)e^(-5t)]ε(t);自由响应yh(t)=[(空2)e^(-t)+(空2)e^(-2t)+(空2)e^(-5t)]ε(t);强迫响应yp(t)=[(空3)e^(-t)+(空3)e^(-2t)+(空3)e^(-5t)]ε(t);暂态响应yT(t)=[(空4)e^(-t)+(空4)e^(-2t)+(空4)e^(-5t)]ε(t);稳态响应ys(t)=[(空5)e^(-t)+(空5)e^(-2t)+(空5)]ε(t);

已知x(t)=[1,0,3]; y(t)=[2,1]; 计算卷积f(t)=x(t)*y(t) A: f(t)=[1,2,3,6] B: f(t)=[2,1,6,3] C: f(t)=[2,0,6] D: f(t)=[3,0,9] E: f(t)=[2,4,1,2]

When you have finished with the book, don’t forget to return it to Tim, ____?[br][/br][A] do you [br][/br][B] will you [br][/br][C] don’t you [br][/br][D] won’t you

t = ('a', 'b', ['A', 'B']) t[2][0] = 'X' 上述语句执行结束后，t为： A: t = ('a', 'b', ['X', 'B']) B: t = ('a', 'b', ['A', 'B']) C: t = ('a', 'X', ['A', 'B']) D: 报错

Lớp Lan bắt đầu học từ tám giờ.[音频]

t=[1,2,3,4]t[1:2]=[5]则t的结果为（ ） A: [1,5,3,4] B: [1，5，2，3，4] C: [1，2，3，4] D: [5,2,3,4]

The 3rd homeworkListen to the following, spell the words in English and translate into Chinese._________________ [ʃeip]• _________________['traiæŋɡl]• ____________[raund]• _______________ ['əuvl]• _______________ [hɑ:t]• _______________ [stɑ:(r)]• _______________ [riŋ]• _______________ [ˈrektæŋɡl]• __________[skweə(r)]• _______________ ['daiəmənd]• _______________ [kju:b]• _______________ [kəʊn]_______________ ['kʌlə(r)]• _______________ [(h)wait] _______________ [blæk]• _______________ ['jeləu] _______________ [ɡri:n]• _______________ [red] _______________ ['silvə(r)]• _______________ ['ɡəuldən] _______________ [piŋk]• _______________ [braun] _______________ [blu:]• _______________ ['pə:pl] _______________ [ɡrei]• _______________ ['aivəri]_______________ [məˈtiəriəl]• _______________ ['leðə(r)] _______________ [klɔθ]• _______________ ['plæstik] _______________ ['rʌbə(r)]• _______________ [ˈmetl] _______________ [wud]_______________ ['tekstʃə(r)]• _______________ [sɔft]• _______________ [hɑ:d]• _______________ ['tendə(r)] _______________ [rʌf]• _______________ [smu:ð] _______________ ['stiki]_______________ [weit ənd ˈvɔlju:m]• _______________ ['sentiˌmi:tə] =(cm)• _______________ ['miliˌmi:tə] =mm• _______________ ['kiləˌmi:tə]=km• _______________ [intʃ] (1 _____ =25.4mm)• _______________ [mail] (1_____=1.609km)• _______________ [ɡræm]=g• _______________ [ˈkiləgræm] =kg.• _______________[paund] (1______=0.4536kg)• _______________ [tʌn]（1______ =1000kg）

What will be the output of the following Python code? [br][/br]['f', 't'][bool('spam')] A: t B: f C: No output D: Erro