When developing a teaching plan for the mother of a child diagnosed with spastic cerebral palsy, which of the following descriptions would the nurse include

A. Wide-based gait and poor muscle coordination.
B. Tremors and lack of active movement.
C. Increased muscle tone and stretch reflexes.
D. Slow, wormlike writhing movements.

钢中加入合金元素的目的是增加硬度、塑性和韧性。