已知等边△ABC的边长为 30 cm,它的重心O到边AB 的距离是 ( )
5cm
During the assessment of a geriatric client, a nurse would expect which findings ?()
A.Eye structure and visual acuity changes.
B.Facial hair decreasing in a female client.
C.Facial hair increasing in a male client.
D.Wounds healing more quickly.
下列各塔中,属于逐级接触式的是:()。
A、己内酰胺萃取塔
B、苯蒸馏塔
C、硫铵汽提塔
D、水萃取塔