重复定位精度
参考答案：指在相同的操作方法和条件下，完成规定操作次数过程中得到结果的一致程度。
68. Yesterday my friend and I went to the supermarket nearby. We found that there were _______ nothing worth buying.
A．almost
B．nearly
C．near
D．About
均衡器对低频衰减比对高频衰减（）；它与电缆的衰减特性（）。
