真实气体的标准态是 ( ) A: f = py的真实气体 B: p = py的真实气体 C: f = py理想气体 D: p = py的理想气体
真实气体的标准态是 ( ) A: f = py的真实气体 B: p = py的真实气体 C: f = py理想气体 D: p = py的理想气体
一个点(Px, Py, Pz)的齐次坐标描述为( ) A: [Px, Py, Pz]T B: [Px, Py, Pz, 0]T C: [Px, Py, Pz, 1]T D: (Px, Py, Pz)
一个点(Px, Py, Pz)的齐次坐标描述为( ) A: [Px, Py, Pz]T B: [Px, Py, Pz, 0]T C: [Px, Py, Pz, 1]T D: (Px, Py, Pz)
count = 0while count < 5: print( count) count = count + 2print( “Over!")
count = 0while count < 5: print( count) count = count + 2print( “Over!")
消费者均衡的条件是() A: Px/Py=MUx/MUy B: Px/Py=MUy/MUx C: Px•Qx=Py•Qy D: Px•Qy=Py•Qy
消费者均衡的条件是() A: Px/Py=MUx/MUy B: Px/Py=MUy/MUx C: Px•Qx=Py•Qy D: Px•Qy=Py•Qy
运行下面程序, 代码的执行结果是( )。 ls = [2021, 20.21, "py"] ls.append("2022") print(ls) A: [2021, 20.21, 'py'] B: [2021, 20.21, 'py', '2022'] C: ['2021', '20.21', 'py', 2022] D: ['2022', '20.20', 'py', 2021]
运行下面程序, 代码的执行结果是( )。 ls = [2021, 20.21, "py"] ls.append("2022") print(ls) A: [2021, 20.21, 'py'] B: [2021, 20.21, 'py', '2022'] C: ['2021', '20.21', 'py', 2022] D: ['2022', '20.20', 'py', 2021]
阅读以下程序public class Count{static int count;int number;public Count(){count = count + 1;number = count;}}class Test{public static void Main(){Count a = new Count();Count b = new Count();Count c = new Count();}}程序运行后,对象a的count值是() A: 0 B: 1 C: 2 D: 3
阅读以下程序public class Count{static int count;int number;public Count(){count = count + 1;number = count;}}class Test{public static void Main(){Count a = new Count();Count b = new Count();Count c = new Count();}}程序运行后,对象a的count值是() A: 0 B: 1 C: 2 D: 3
count = 0 while count < 5: print (count, " 小于 5") count = count + 1 else: print (count, " 大于或等于 5")
count = 0 while count < 5: print (count, " 小于 5") count = count + 1 else: print (count, " 大于或等于 5")
下列if语句中,程序风格最规范的是()。 A: if (count >;= 100) count = 0; B: if (count >;= 100) {count = 0;} C: if (count >;= 100)count = 0; D: if (count >;= 100){count = 0;}
下列if语句中,程序风格最规范的是()。 A: if (count >;= 100) count = 0; B: if (count >;= 100) {count = 0;} C: if (count >;= 100)count = 0; D: if (count >;= 100){count = 0;}
x='py',py='56',则关于eval()函数,以下正确的是: A: eval(x)='py' B: eval(x)='56' C: eval('x')=py D: eval('x')='56'
x='py',py='56',则关于eval()函数,以下正确的是: A: eval(x)='py' B: eval(x)='56' C: eval('x')=py D: eval('x')='56'
设随机变量X~N(0,1).Y~N(1,4)且相关系数ρXY=1,则______. A: PY=-2X-1=1 B: PY=2X-1=1 C: PY=-2X+1=1 D: PY=2X+1=1
设随机变量X~N(0,1).Y~N(1,4)且相关系数ρXY=1,则______. A: PY=-2X-1=1 B: PY=2X-1=1 C: PY=-2X+1=1 D: PY=2X+1=1