Assertion: knee's joint | /r/HasProperty | first-class levers
Facets:
Source sentences:
text: Which of the following is true regarding joints that are first-class levers?
text: Which of the following is true of joints that are first-class levers?
text: Which of the following is true regarding joints that are first-class levers
text: Which of the following is true of joints that are first-class levers?