A community nurse is performing a physical assessment on an 18-month-old child. Which of the following would be best

A. Carry out the assessment from head to toe.
B. Assess motor function by having the child run and walk.
C. Have the mother hold the toddler on her lap.
D. Assess the respiratory and cardiac systems first.

在大功率采煤机中配有破碎机装置，它的用途是破碎（）。

A、大块碎石

B、小块碎石

C、大块煤

D、小块煤