A. 第1组 1. arm 2. internal 3. wrist 4. spinal 5. extremites 6. legs 7. hand 8. external

B. 第2组 A. the body part that connects the hand to the arm B. located inside of something C. the body parts extending from the shoulders D. parts of the body furthest from the center E. the body parts located below the waist that people stand on F. relating to the bones in the back and neck G. the end of the arm that grabs and holds things H. located on the outside of something