在弯矩作用下,摩擦型高强度螺栓群的中和轴位于()
参考答案:螺栓群的形心
All of us must practice _____ English after class .[ ]
A. saying
B. speaking
C. say
D.speak
下面程序段是利用For语句给数组a赋值,使a(1)=1,a(2)=3,a(3)=5,……,a(50)=99,则划线处的语句应该是()。 Dim a(1 to 50) As Integer For i=1 To 50 ______Next i
A.a(i)=2*i+1
B.a(i)=2*(i+1)
C.a(i)=i+2
D.a(i)=2*i-1