If 7l is an odd integer，then n2-1 must be（）
A: a prime number
B: an odd integer
C: divisible by 8
D: a multiple of 2n
E: a positive integer
A: a prime number
B: an odd integer
C: divisible by 8
D: a multiple of 2n
E: a positive integer
举一反三
- If y is an odd integer, which of the following must be an even integer ？（） A: y+2 B: y+6 C: 2y-1 D: 3y E: 3y+1
- If x is an even integer and y is an odd integer, then which of the following is an even integer ？（） A: x2+y B: x2-y C: （x2）（y） D: x+y E: x-y
- 下列数组声明正确的是( )。 A: n=5 Dim a(1 to n) As Integer B: Dim a(10) As Integer ReDim a(1 To 12) C: Dim a() As Single ReDim a(3,4) As Integer ReDim a(1 to n)As Integer D: Dim a() As Integer n=5
- 下列数组声明语句，________是正确的。 A: Dim a(2,3) As Integer B: Dim a(m,n) As Integer C: Dim a(2 3) As Integer D: Dim a[3,2] As Integer
- 下面子过程语句说明合法的是 A: Sub f1(s1 As String*8) B: Sub f1(n()As Integer)As Integer C: Function f1(f1 As Integer)As Integer D: Function f1(By Val n As Integer)