铁塔的装配式基础自然接地极的工频接地电阻（Ω）简易计算式是（）。
A.R=2ρ/L
B.R=0.2ρ／v
C.R=0.1ρ
D.R=0.06ρ
参考答案：C
As an adolescent is receiving care, he’s inadvertently injured with a warm compress. The nurse completes an incident report based on the knowledge that identification of which of the following is not a goal of the report（）
A. Staff involved so they’re reprimanded for their actions.
B. Learning needs of staff to prevent recurrence of incidents.
C. Patterns of client care problems.
D. Facts surrounding each incident.
用于再矿化治疗时，再矿化液的pH一般调至
A．5
B．6
C．7
D．8
E．9
