不属于腔内探头的是() ["A．阴道探头","B．直肠探头","C．食管探头","D．胃镜探头","E．普通扇型探头"]
超声引起细胞和组织发生变化的机制是() ["A．振动和辐射","B．吸收和反射","C．直接和间接","D．热和空化效应","E．以上均不是"]
血液、尿液、胆汁、胸腹水在人体体液中声衰减程度谁最低() ["A．血液","B．尿液","C．胆汁","D．胸腹水","E．声衰减一样"]
角膜的屈光力约为()晶状体的屈光力约为() ["A．43D","B．42D","C．41D","D．19D","E．18D"]
一眼为正视眼，另眼与之度数相差最小达到多少时出现融像困难()正视眼在60岁以上约需附加()正视眼在50岁左右约需附加()正视眼在45岁左右约需附加()如一凸透镜的焦距为O.5m，则该镜的屈光力为() ["A．+1.50D","B．+2.00D","C．+2.50D","D．+3.00D","E．+4.00D"]
矫正远视散光用()矫正远视用()矫正近视散光用()矫正近视用()矫正斜视用()
