题目内容
(请给出正确答案)
[单选题]
以下代码的运行结果为()。x=[1,2,3];x.append([4,5]);x.extend([6,(7,8)]);print(x);
A.[1,2,3,4,5,6,7,8]
B.[1,2,3,[4,5],6,(7,8)]
C.[1,2,3,4,5,[6,(7,8)]]
D.[1,2,3,[4,5],6,7,8]
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A.[1,2,3,4,5,6,7,8]
B.[1,2,3,[4,5],6,(7,8)]
C.[1,2,3,4,5,[6,(7,8)]]
D.[1,2,3,[4,5],6,7,8]
A.[1,2]
B.[1,2,[2]]
C.[1,2,[]]
D.[1,2,3]
运行下面代码的输出结果为()。
importnumpyasnpa=np.array([[1,2,3],[3,4,5],[4,5,6]])
print(np.mean(a,a×is=0))
A.[[123][345][456]]
B.3.6666666666666665
C.[2.666666673.666666674.66666667]
D.[2.4.5.]
A.[[123][456]]
B.[123456789]
C.[[123][456][789]]
D.[[123555][456789]]
A.int a[2][ ]={{1,0,2},{3,4,5}}
B.int a[2][3]={{1,2,3},{4,5,6},{6}}
C.int a[3][4]={{1,2,3},{4,5},{6}}
D.int a[2][]={{1,2},{3,4}{5,6}}
A.inta[2]0={1,2,1},{5,2,3}
B.inta0[3]={1,0,1},{5,2,3}
C.inta[2][4]={1,2,3},{4,5},{6}
D.inta0[3]={1,2,1},{0,{1,1}