f(n)是O(2ⁿ)且g(n)是O(n²) A: f(n)g(n)是Ο(4ⁿ) B: f(n)+g(n)是Ο(n^4) C: f(n)+g(n)是Ο(2n²) D: f(n)g(n)是Ο(n^4)

下列程序段不能正确显示1！、2！、3！、4！的结果的是 。 A: For i = 1 To 4 For j = 1 To i n = 1 n = n * j Next j MsgBox( n)Next i B: Dim i%, j%, n%For i = 1 To 4 n = 1 For j = 1 To i n = n * j Next j MsgBox( n)Next i C: Dim j%, n%n = 1For j = 1 To 4 n = n * j MsgBox( n)Next j D: Dim j%, n%n = 1j = 1Do While j<=4 n=n*j MsgBox(n) j=j+1Loop E: Dim j%, n%n = 1j = 1Do n=n*j MsgBox(n) j=j+1Loop While j<=4

下列程序段能分别正确显示1!、2!、3!、4!的值的是______。 A: For i = 1 To 4 n = 1 For j = 1 To i n = n * j MsgBox(n) Next jNext i B: For i = 1 To 4 For j = 1 To i n = 1 n = n * j Next j MsgBox(n)Next i C: n = 1For i = 1 To 4 For j = 1 To 4 n = n * j MsgBox(n) Next jNext i D: n = 1j = 1Do While j &lt;= 4 n = n * j MsgBox(n) j = j + 1Loop

下列程序段能且只能显示1！、2！、3！、4！的值的是（ ）。 A: For i = 1 To 4 n = 1 For j = 1 To i n = n * j Next j MsgBox(n)Next i B: For i = 1 To 4 For j = 1 To i n = 1 n = n * j Next j MsgBox(n)Next i C: n = 1For i = 1 To 4 For j = 1 To 4 n = n * j MsgBox(n) Next jNext i D: n = 1j = 1Do While j <= 4 n = n * j j = j + 1LoopMsgBox(n)

下面____程序段不能正确显示1!、2!、3!、4!的值。 A: For I=1 To 4 n=1 For j=1 to I n=n*j Next j Print n Next I B: For I=1 To 4 For j=1 to I n=1 n=n*j Next j Print n Next I C: n=1 For j=1 to 4 n=n*j Print n Next j D: n=1:j=1 Do While j<=4 n=n*j Print n j=j+1Loop

If an algorithm has running time $T(n)= O(n\log n)$, then $T(n)$ may most likely satisfy that _____. A: $T(n) = 4T(n/4) + O(n^2)$ B: $T(n) = 4T(n/4) + O(n) $ C: $T(n) = 3T(n/2)+O(n) $ D: $T(n) = 2T(n/2) + O(\log n)$

能判断某一年n是否为闰年的表达式是 。 A: n%4==0&amp;&amp;n%100!=0||n%400==0 B: y%100!=0||y%4==0||y%400==0 C: n%4==0||n%100!=0||n%400==0 D: n%4==0&amp;&amp;n%100!=0&amp;&amp;n%400==0

用δ(n)及其延迟项表示序列x(n)={2, -3 , 4,1},结果为( ) A: x(n)=2δ(n)-3δ(n-1)+4δ(n-2)+δ(n-3 B: x(n)=2δ(n-1)-3δ(n)+4δ(n+1)+δ(n+2) C: x(n)=2δ(n+1)-3δ(n)+4δ(n-1)+δ(n-2) D: x(n)=2δ(n)-3δ(n+1)+4δ(n+2)+δ(n+3)

在由N个构件组成的机构中,有_____个相对瞬心,有____个绝对瞬心。 A: N(N−1)/4,N(N−1)/4 B: (N−1)(N−2)/2,N−1; C: N,N(N−3)/2 D: N(N−3)/2,N

在由N个构件组成的机构中,有______个相对瞬心,有____个绝对瞬心。(4.0) A: N(N−3)/2 ,N B: N(N−1)/2,N−1; C: N(N−1)/4 ,N(N−1)/4 D: N ,N(N−3)/2