探头晶片尺寸增加，对探伤有哪些不利因素？
参考答案：
探头晶片尺寸增加，近场区长度增加，对探伤不利。
---_____ do you eat junk food?
--- I like it. I eat it three times a week.
A．How long
B．How far
C．How often
D．How much
地坪
