感应加热淬火时,若频率为1—10kHZ,则淬硬层深度为()。
A.17.5mm以上
B.26—48mm
C.2—8mm
D.9mm以上
参考答案:C
The ancient penguin was modern ones and it was good at swimming but couldn’t fly.
A.as large as twice
B.larger than twice
C.twice the size of
D.twice as larger as
出售无形资产所取得的收入应通过“其他业务收入”科目核算。( )