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() ["A．凸透镜","B．凹透镜","C．凸柱镜","D．凹柱镜","E．三棱镜"]
远视眼的远点在()近视眼的远点在()正视眼的远点在() ["A．无限远","B．眼前某一点","C．眼后","D．视网膜上","E．以上都不是"]
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"]
彩色多普勒血流成像中规定() ["A．朝向探头的血流为红色","B．背向探头的血流为红色","C．朝向探头的血流为蓝色","D．背向探头的血流为绿色","E．朝向探头的血流为绿色"]
下列哪种物质具有较高的声阻抗系数() ["A．固体","B．液体","C．气体","D．软组织","E．上述各种声阻抗系数相等"]
+4.00D()+6.00D()-8.00D()-2.00D()-5.00D()
