列哪个检验频率产生最大透入深度的涡流?()
A.100HZ
B.10KHZ
C.1MHZ
D.10MHZ
参考答案:A
With income going down and prices ______, it is very hard to make a living nowadays. [ ]
A. rising up
B. rising
C. rise
D. rise up
表格控件使用的数据资源大多数是来自 [8] 和 [9] 。