When prioritizing a client’s care plan based on Maslow’s hierarchy of needs, the nurse’s first priority would be

A. allowing the family to see a newly admitted client.
B. ambulating the client in the hallway.
C. administering pain medication.
D. placing wrist restraints on the client.

如图所示的伏安法测电阻电路中，电压表的内阻为3kΩ，读数为3V；电流表内阻为10Ω，读数为4mA．待测电阻R的真实值等于(    )

A．750Ω          B．760Ω       C．1000Ω        D．1010Ω