A：where is his mother
B：where his mother is
C：where was his mother
D：where his mother was
Dim a As Integer, b As Integer, c As Integer, y As Integer
a=3:b=4:c=4
If a<=b And c<=a Then
y=a+b
ElseIf a<=b or b<=c Then
y=b+c
ElseIf b=c Then
y=a mod c
Else
y=a+b+c
End If
该程序段运行之后，变量y的值为（ ）
选择正确的读音
虎啸狮吼（xiào xiāo）____ 趵突泉（bào diào ）____
晶莹剔透（tī tì ）____ 昼夜 （zhòu zòu ）____
沈括《梦溪笔谈》载：“世间锻铁所谓钢铁者，用柔铁屈盘之，乃以生铁陷其间，泥封炼之，锻令相入，谓之团钢。”这项技术最早出现于（ ）
