执行下列事件过程,y的值为。 Private Sub Command1_Click() x = 3 If x > 10 Then y = x ^ 2 + 3 * x + 2 Else If x > 5 Then y = 3 * x + 2 Else y = 5 End If End If End Sub
执行下列事件过程,y的值为。 Private Sub Command1_Click() x = 3 If x > 10 Then y = x ^ 2 + 3 * x + 2 Else If x > 5 Then y = 3 * x + 2 Else y = 5 End If End If End Sub
执行以下语句的结果:dict1={"x":1,"y":2,"z":3}dict2={"x":4,"a":5}dict1.update(dict2) A: {"x":1,"y":2,"z":3,"x":4,"a":5} B: {"x":4,"a":5,"x":1,"y":2,"z":3} C: 有重复项,结果有误! D: {"x":4,"y":2,"z":3,"a":5}
执行以下语句的结果:dict1={"x":1,"y":2,"z":3}dict2={"x":4,"a":5}dict1.update(dict2) A: {"x":1,"y":2,"z":3,"x":4,"a":5} B: {"x":4,"a":5,"x":1,"y":2,"z":3} C: 有重复项,结果有误! D: {"x":4,"y":2,"z":3,"a":5}
x=2,y=5,z=3 (x>y)+z*4=?
x=2,y=5,z=3 (x>y)+z*4=?
微分方程\(2y''+5y'=5x^2-2x-1\)的通解是( )。 A: \(y=C_1+C_2e^{-\frac{5}{2}x}+\frac{1}{3}x^3-\frac{3}{5}x^2+\frac{7}{25}x\) B: \(y=C_1+C_2e^{-\frac{5}{2}x}+\frac{1}{3}x^3-\frac{3}{5}x^2\) C: \(y=C_1+C_2e^{-\frac{5}{2}x}+\frac{1}{3}x^3+\frac{7}{25}x\) D: \(y=C_1+C_2e^{-\frac{5}{2}x}-\frac{3}{5}x^2+\frac{7}{25}x\)
微分方程\(2y''+5y'=5x^2-2x-1\)的通解是( )。 A: \(y=C_1+C_2e^{-\frac{5}{2}x}+\frac{1}{3}x^3-\frac{3}{5}x^2+\frac{7}{25}x\) B: \(y=C_1+C_2e^{-\frac{5}{2}x}+\frac{1}{3}x^3-\frac{3}{5}x^2\) C: \(y=C_1+C_2e^{-\frac{5}{2}x}+\frac{1}{3}x^3+\frac{7}{25}x\) D: \(y=C_1+C_2e^{-\frac{5}{2}x}-\frac{3}{5}x^2+\frac{7}{25}x\)
图示的力分别在x、y、z三轴上的投影为() A: X=2√2P/5,Y=3√2P/10,Z=√2P/2 B: X=2√2P/5,Y=-3√2P/10,Z=-√2P/2 C: X=-2√2P/5,Y=3√2P/10,Z=√2P/2 D: X=-2√2P/5,Y=-3√2P/10,Z=√2P/2
图示的力分别在x、y、z三轴上的投影为() A: X=2√2P/5,Y=3√2P/10,Z=√2P/2 B: X=2√2P/5,Y=-3√2P/10,Z=-√2P/2 C: X=-2√2P/5,Y=3√2P/10,Z=√2P/2 D: X=-2√2P/5,Y=-3√2P/10,Z=√2P/2
线性方程组2x+3y = 13x+y =5的解是( ), 你知道用Matlab怎么求解吗? A: x=2, y=3 B: x=3, y=3 C: x=2, y=2 D: x=1, y=3
线性方程组2x+3y = 13x+y =5的解是( ), 你知道用Matlab怎么求解吗? A: x=2, y=3 B: x=3, y=3 C: x=2, y=2 D: x=1, y=3
图示的力分别在x、y、z三轴上的投影为( )。[img=277x232]1786983f925fb81.png[/img] A: X=2Ö2P/5, Y=3Ö2P/10, Z=Ö2P/2 B: X=2Ö2P/5, Y= - 3Ö2P/10, Z= - Ö2P/2 C: X= - 2Ö2P/5, Y=3Ö2P/10, Z=Ö2P/2 D: X= - 2Ö2P/5, Y= - 3Ö2P/10, Z=Ö2P/2
图示的力分别在x、y、z三轴上的投影为( )。[img=277x232]1786983f925fb81.png[/img] A: X=2Ö2P/5, Y=3Ö2P/10, Z=Ö2P/2 B: X=2Ö2P/5, Y= - 3Ö2P/10, Z= - Ö2P/2 C: X= - 2Ö2P/5, Y=3Ö2P/10, Z=Ö2P/2 D: X= - 2Ö2P/5, Y= - 3Ö2P/10, Z=Ö2P/2
图示的力分别在x、y、z三轴上的投影为( )[img=260x229]1786983fb13c0a2.png[/img] A: X= - 3Ö2P/10, Y= 2Ö2P/5, Z= - Ö2P/2 B: X= - 2Ö2P/5, Y= 3Ö2P/10, Z= - Ö2P/2 C: X= 3Ö2P/10, Y= - 2Ö2P/5, Z= - Ö2P/2 D: X= 2Ö2P/5, Y= 3Ö2P/10, Z= - Ö2P/2
图示的力分别在x、y、z三轴上的投影为( )[img=260x229]1786983fb13c0a2.png[/img] A: X= - 3Ö2P/10, Y= 2Ö2P/5, Z= - Ö2P/2 B: X= - 2Ö2P/5, Y= 3Ö2P/10, Z= - Ö2P/2 C: X= 3Ö2P/10, Y= - 2Ö2P/5, Z= - Ö2P/2 D: X= 2Ö2P/5, Y= 3Ö2P/10, Z= - Ö2P/2
执行y=[x for x in range(5) if x%2==1]后,y结果是( )。 A: [1, 3, 5] B: [0, 2, 4] C: [1, 3] D: [2, 4]
执行y=[x for x in range(5) if x%2==1]后,y结果是( )。 A: [1, 3, 5] B: [0, 2, 4] C: [1, 3] D: [2, 4]
若x=2,y=3,则x & y的值是( ) A: 0 B: 2 C: 3 D: 5
若x=2,y=3,则x & y的值是( ) A: 0 B: 2 C: 3 D: 5