下面程序段中正确的是( )。 A: If x＜0 Then y=0 If x＜1 Then y=1 If x＜2 Then y=2 If x＞=2 Then y=3 B: If x＞=2 Then y=3 If x＞1 Then y=2 If x＞=0Then y=1 If x＞0 Then y=0 C: If x＜0 Then y=0 Else If＞=0Then y=1 Else y=3 End If D: If x＞=2 Then y=3 Else If＞=1 Then y=2 Else y=0 End If

【单选题】分段函数: ,下面程序段中正确的是__________。 A. If x < 0 Then y = 0 If x < 1 Then y = 1 If x < 2 Then y = 2 If x >= 2 Then y = 3 B. If x >= 2 Then y = 3 If x >= 1 Then y = 2 If x > 0 Then y = 1 If x < 0 Then y = 0 C. If x < 0 Then y = 0 ElseIf x > 0 Then y = 1 ElseIf x > 1 Then y = 2 Else y = 3 End If D. If x > =2 Then y = 3 ElseIf x > =1 Then y = 2 ElseIf x > =0 Then y = 1 Else y = 0 End If

已知点()(()-()1(),()y()1())(),()(2(),()y()2())(),()(()-()3(),()y()3())()都在函数()y()=()x()2()的图象上,则()()A.()y()1()<()y()2()<()y()3()B.()y()1()<()y()3()<()y()2()C.()y()3()<()y()2()<()y()1()D.()y()2()<()y()1()<()y()3

分段函数：[img=206x91]18037123bea18f3.png[/img],下面程序段中正确的是__________。 A: If x < 0 Then y = 0If x < 1 Then y = 1If x < 2 Then y = 2If x >= 2 Then y = 3 B: If x > =2 Then y = 3ElseIf x > =1 Then y = 2ElseIf x > =0 Then y = 1Else y = 0End If C: If x >= 2 Then y = 3If x >= 1 Then y = 2If x > 0 Then y = 1If x < 0 Then y = 0 D: If x < 0 Then y = 0ElseIf x > 0 Then y = 1ElseIf x > 1 Then y = 2Else y = 3End If E: If x < 0 Then y = 0If 0 <= x <1 Then y = 1If 1 <= x < 2 Then y = 2If x >= 2 Then y = 3

已知y(n)+2ay(n-1)+by(n-2)=0，y(0)=0，y(1)=3，y(2)=6，y(3)=36，求y(n)。

已知int x=3,y=4;，写出下列表达式的值 (1) (x,y) (2) x>y?x:y (3) x?y:x (4) (x>y)?(y>=2)?1:2:(y>x)?x:y

求下列微分方程的通解：(1)y〞－2yˊ＝0；(2)y〞－3yˊ＋2y＝0；(3)y〞＋4y＝0；(4)y〞－4yˊ＋5y＝0；(5)y〞－6yˊ＋9y＝0；(6)y〞＋2yˊ＋ay＝0；(7)y〞＋6y〞＋10yˊ＝0；(8)y(4)－2y〞＋y＝0；(9)y(4)＋2y〞＋y＝0；(10)y(4)＋3y〞－4y＝0．

如下程序的运行结果是（ ） intx=1,y=1;if(x==1) y=x+1;elseif(y==2) x=y+1;else y=0; A: x=1, y=2 B: x=3, y=2 C: x=3, y=0 D: x=1, y=0

Consider the following sequence: x(n)={3,-6,5,-1,0,7,8}, -1≤n≤5.suppose the sequence y(n)=x(-n-2),then y(0)=______ , y(-2)=______ , y(-4)=______ , y(-6)=______ , y(2)=______ .

分段函数：[img=203x91]17de5f2f296a7ac.jpg[/img],下面程序段中正确表达的是 。 A: If x >; =2 Then y = 3ElseIf x >; =1 Then y = 2ElseIf x >; =0 Then y = 1Else y = 0End If B: If x <; 0 Then y = 0If x <; 1 Then y = 1If x <; 2 Then y = 2If x >;= 2 Then y = 3 C: If x >;= 2 Then y = 3If x >;= 1 Then y = 2If x >; 0 Then y = 1If x <; 0 Then y = 0 D: If x <; 0 Then y = 0ElseIf x >; 0 Then y = 1ElseIf x >; 1 Then y = 2Else y = 3End If E: If x <; 0 Then y = 0If 0 <;= x <;1 Then y = 1If 1 <;= x <; 2 Then y = 2If x >;= 2 Then y = 3