Final answer:
To measure 3 mL of an oral liquid, you can use a graduated cylinder or an oral syringe.
Step-by-step explanation:
To measure 3 mL of an oral liquid, you can use a graduated cylinder or an oral syringe. A graduated cylinder is a tall, narrow container with markings that indicate different volumes. To measure 3 mL, you would pour the liquid into the graduated cylinder and ensure that the bottom of the meniscus (the curved surface of the liquid) is at the 3 mL mark. An oral syringe is a device with a small, removable tip that can be used to measure and administer oral medications. To measure 3 mL, you would draw up the liquid into the syringe until the plunger reaches the 3 mL mark.