相关试题
单选题 水浸法检验中衰减最快的波形是;········································· ( )
单选题 靠近探头的长条形缺陷并不一定都能探测到;因为;························ ( )
单选题 用声速和频率描述波长的方程为;·········································· ( )
单选题 晶片与探测面平行,使超声波垂直于探测面进入探测材料的检验方法称为;·······( )
单选题 公式 Sinθ1/C1=Sinθ 2/C2 叫做;·········································· ( )
单选题 超声波换能器通常是用电压材料制作的,下述材料哪一种不是压电材料;········ ( )
单选题 超声波射到界面波上,在同一介质中改变其转播方向的现象叫做;··············· ( )
单选题 用水浸法检验零件时;通常用于产生横波的方法是·························· ( )