nasal preparations

A．DesigningB．DesignedC．PreparingD．Prepared

／w／ and ／j／ belong toA．fricative.B．affricate.C．approximant.D．nasal.

The vibration of the vocal cords will causeA．nasality.B．aspiration.C．obstruction.D．voicing

sustained release preparation：

sustained—release preparations：

active targeting preparation