已知()x()(()n())()的()z()变换是()X()(()z())(),()ROC()是()|()z()|()>()a(),则()x(()-()n()-()5())()的()z()变换和()ROC()是()()A.()()z()-()5()X()(1/()z()),z()>()1/()a()B.()()z()5()X()(1/()z()),z()>()1/()a()C.()()z()-()5()X()(1/()z()),z()<()1/()a()D.()()z()5()X()(1/()z()),z()<()1/()a
已知()x()(()n())()的()z()变换是()X()(()z())(),()ROC()是()|()z()|()>()a(),则()x(()-()n()-()5())()的()z()变换和()ROC()是()()A.()()z()-()5()X()(1/()z()),z()>()1/()a()B.()()z()5()X()(1/()z()),z()>()1/()a()C.()()z()-()5()X()(1/()z()),z()<()1/()a()D.()()z()5()X()(1/()z()),z()<()1/()a
斜二测轴测图中,当坐标平面XOZ平行于轴测投影面时,轴测轴( )的轴间角为90°。 A: O<sub>1</sub>X<sub>1</sub>和O<sub>1</sub>Z<sub>1</sub> B: O<sub>1</sub>X<sub>1</sub>和O<sub>1</sub>Y<sub>1</sub> C: O<sub>1</sub>Y<sub>1</sub>和O<sub>1</sub>Z<sub>1</sub> D: O<sub>1</sub>X<sub>1</sub>和O
斜二测轴测图中,当坐标平面XOZ平行于轴测投影面时,轴测轴( )的轴间角为90°。 A: O<sub>1</sub>X<sub>1</sub>和O<sub>1</sub>Z<sub>1</sub> B: O<sub>1</sub>X<sub>1</sub>和O<sub>1</sub>Y<sub>1</sub> C: O<sub>1</sub>Y<sub>1</sub>和O<sub>1</sub>Z<sub>1</sub> D: O<sub>1</sub>X<sub>1</sub>和O
为了给x、y、z三个变量赋初值1,下面正确的赋值语句是________: x=1, y=1 ,x=1|x=1: y=1: z=1|x=y=z=1|xyz=1
为了给x、y、z三个变量赋初值1,下面正确的赋值语句是________: x=1, y=1 ,x=1|x=1: y=1: z=1|x=y=z=1|xyz=1
设x,y,z均为整型变量,有如下程序段 x=y=z=0; ++x&&++y||++z; 则该程序运行后,x,y,z的值分别是: A: x=1,y=0,z=0 B: x=1,y=1,z=1 C: x=1,y=1,z=0 D: x=1,y=0,z=1
设x,y,z均为整型变量,有如下程序段 x=y=z=0; ++x&&++y||++z; 则该程序运行后,x,y,z的值分别是: A: x=1,y=0,z=0 B: x=1,y=1,z=1 C: x=1,y=1,z=0 D: x=1,y=0,z=1
填补下图邻接矩阵( )[img=448x230]17de70f872e6a88.jpg[/img]邻接矩阵: V1V2V3V4V5V6V7V10000101V21010000V3000X000V40000Z10V5011Y001V60000100V70000010 A: X=1; Y=1; Z=0 B: X=1; Y=1; Z=1 C: X=1; Y=0; Z=0 D: X=0; Y=1; Z=0
填补下图邻接矩阵( )[img=448x230]17de70f872e6a88.jpg[/img]邻接矩阵: V1V2V3V4V5V6V7V10000101V21010000V3000X000V40000Z10V5011Y001V60000100V70000010 A: X=1; Y=1; Z=0 B: X=1; Y=1; Z=1 C: X=1; Y=0; Z=0 D: X=0; Y=1; Z=0
为了给三个变量赋初值1,下面正确的赋值语句是________. A: x=1:y=1:z=1 B: x=1,y=1,z=1 C: x=y=z=1 D: xyz=1
为了给三个变量赋初值1,下面正确的赋值语句是________. A: x=1:y=1:z=1 B: x=1,y=1,z=1 C: x=y=z=1 D: xyz=1
【单选题】已知序列x(n)的双边z变换为X(z),收敛域|z|>|a|,则x(-n)的双边z变换和收敛域为() A. X(-z),|z|>|a B. X(1/z),|z|>1/|a| C. X(1/z),|z|<1/|a| D. X(-z),|z|
【单选题】已知序列x(n)的双边z变换为X(z),收敛域|z|>|a|,则x(-n)的双边z变换和收敛域为() A. X(-z),|z|>|a B. X(1/z),|z|>1/|a| C. X(1/z),|z|<1/|a| D. X(-z),|z|
\( {1 \over {1 + x}} \)的麦克劳林公式为( )。 A: \( {1 \over {1 + x}} = 1 + x + { { {x^2}} \over 2} + \cdots + { { {x^n}} \over {n!}} + o\left( { { x^n}} \right) \) B: \( {1 \over {1 + x}} = 1 + x + {x^2} + \cdots + {x^n} + o\left( { { x^n}} \right) \) C: \( {1 \over {1 + x}} = 1 - x + {x^2} - \cdots + {( - 1)^n}{x^n} + o\left( { { x^n}} \right) \) D: \( {1 \over {1 + x}} = 1 - x - { { {x^2}} \over 2}- \cdots - { { {x^n}} \over {n!}} + o\left( { { x^n}} \right) \)
\( {1 \over {1 + x}} \)的麦克劳林公式为( )。 A: \( {1 \over {1 + x}} = 1 + x + { { {x^2}} \over 2} + \cdots + { { {x^n}} \over {n!}} + o\left( { { x^n}} \right) \) B: \( {1 \over {1 + x}} = 1 + x + {x^2} + \cdots + {x^n} + o\left( { { x^n}} \right) \) C: \( {1 \over {1 + x}} = 1 - x + {x^2} - \cdots + {( - 1)^n}{x^n} + o\left( { { x^n}} \right) \) D: \( {1 \over {1 + x}} = 1 - x - { { {x^2}} \over 2}- \cdots - { { {x^n}} \over {n!}} + o\left( { { x^n}} \right) \)
intx=5,y=8,z=7;表达式z=!(x>y)||(x=1,y=3)计算后的结果 A: x=1,y=3,z=1 B: x=1,y=3,z=0 C: x=5,y=8,z=0 D: x=5,y=8,z=1
intx=5,y=8,z=7;表达式z=!(x>y)||(x=1,y=3)计算后的结果 A: x=1,y=3,z=1 B: x=1,y=3,z=0 C: x=5,y=8,z=0 D: x=5,y=8,z=1
\( {1 \over {1 + x}} \)的麦克劳林公式为( ). A: \( {1 \over {1 + x}} = 1 + x + { { {x^2}} \over 2} + \cdots + { { {x^n}} \over {n!}} + o\left( { { x^n}} \right) \) B: \( {1 \over {1 + x}} = 1 + x + {x^2} + \cdots + {x^n} + o\left( { { x^n}} \right) \) C: \( {1 \over {1 + x}} = 1 - x + {x^2} - \cdots + {( - 1)^n}{x^n} + o\left( { { x^n}} \right) \)
\( {1 \over {1 + x}} \)的麦克劳林公式为( ). A: \( {1 \over {1 + x}} = 1 + x + { { {x^2}} \over 2} + \cdots + { { {x^n}} \over {n!}} + o\left( { { x^n}} \right) \) B: \( {1 \over {1 + x}} = 1 + x + {x^2} + \cdots + {x^n} + o\left( { { x^n}} \right) \) C: \( {1 \over {1 + x}} = 1 - x + {x^2} - \cdots + {( - 1)^n}{x^n} + o\left( { { x^n}} \right) \)