• 2022-07-28 问题

    已知变量s的值是一个字符串,以下能用于判断s这个字符串是否以字符“0”开头,且以字符“9”结尾的表达式为: A: A.s[0]="0" or s[-1]="9" B: A.s[0]==0 and s[9]==9 C: s[0]=="0" and s[-1]=="9" D: A.s[0]=="0" or s[-1]=="9"

    已知变量s的值是一个字符串,以下能用于判断s这个字符串是否以字符“0”开头,且以字符“9”结尾的表达式为: A: A.s[0]="0" or s[-1]="9" B: A.s[0]==0 and s[9]==9 C: s[0]=="0" and s[-1]=="9" D: A.s[0]=="0" or s[-1]=="9"

  • 2022-05-28 问题

    以4,9,1为为插值节点,求\(\sqrt x \)的lagrange的插值多项式 A: \( {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) + {1 \over {24}}(x - 4)(x - 9)\) B: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) + {1 \over {24}}(x - 4)(x - 9)\) C: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x +1) + {1 \over {24}}(x - 4)(x - 9)\) D: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) - {1 \over {24}}(x - 4)(x - 9)\)

    以4,9,1为为插值节点,求\(\sqrt x \)的lagrange的插值多项式 A: \( {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) + {1 \over {24}}(x - 4)(x - 9)\) B: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) + {1 \over {24}}(x - 4)(x - 9)\) C: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x +1) + {1 \over {24}}(x - 4)(x - 9)\) D: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) - {1 \over {24}}(x - 4)(x - 9)\)

  • 2022-07-28 问题

    已知变量s的值是一个字符串,以下能用于判断s这个字符串是否以字符“0”开头,且以字符“9”结尾的表达式为: A: s[0]==0 and s[9]==9 B: s[0]="0" or s[-1]="9" C: s[0]=="0" and s[-1]=="9" D: s[0]=="0" or s[-1]=="9"

    已知变量s的值是一个字符串,以下能用于判断s这个字符串是否以字符“0”开头,且以字符“9”结尾的表达式为: A: s[0]==0 and s[9]==9 B: s[0]="0" or s[-1]="9" C: s[0]=="0" and s[-1]=="9" D: s[0]=="0" or s[-1]=="9"

  • 2022-06-03 问题

    已知△ABC∽△DEF,S△ABC∶S△DEF=9∶1,那么对应边=________.

    已知△ABC∽△DEF,S△ABC∶S△DEF=9∶1,那么对应边=________.

  • 2021-04-14 问题

    xF=G=bbA

    xF=G=bbA

  • 2022-06-07 问题

    s=1/(1*3)-1/(3*5)+1/(5*7)-1/(7*9)+......-1/(99*101),编程求s的值并输出

    s=1/(1*3)-1/(3*5)+1/(5*7)-1/(7*9)+......-1/(99*101),编程求s的值并输出

  • 2022-06-16 问题

    单片机电源是第( )引脚 A: 20 B: 40 C: 9 D: 1

    单片机电源是第( )引脚 A: 20 B: 40 C: 9 D: 1

  • 2021-04-14 问题

    密西根州立大学设有BBA

    密西根州立大学设有BBA

  • 2022-06-06 问题

    以下程序段实现的输出是()。for(i=0;i<;=9;i++)s[i]=i;for(i=9;i>;=0;i--)printf("%2d",s[i]);[/i][/i] A: 9 7 5 3 1 B: 1 3 5 7 9 C: 9 8 7 6 5 4 3 2 1 0 D: 0 1 2 3 4 5 6 7 8 9

    以下程序段实现的输出是()。for(i=0;i<;=9;i++)s[i]=i;for(i=9;i>;=0;i--)printf("%2d",s[i]);[/i][/i] A: 9 7 5 3 1 B: 1 3 5 7 9 C: 9 8 7 6 5 4 3 2 1 0 D: 0 1 2 3 4 5 6 7 8 9

  • 2022-05-27 问题

    Part I Listening Comprehension (15minutes)Directions: This part is to test your listening ability. It consists of 3 sections.Section A 1 A: It’s 9:00 B: It’s 9:30 C: It’s 10:00 D: It’s 10:30

    Part I Listening Comprehension (15minutes)Directions: This part is to test your listening ability. It consists of 3 sections.Section A 1 A: It’s 9:00 B: It’s 9:30 C: It’s 10:00 D: It’s 10:30

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