采集的牛O-P液（咽食道分泌物），未能及时送检应置于（）℃保存。
A.4
B.-20
C.-30
D.-70
参考答案：C
根据我国《保险法》的规定，投保人、被保险人未按照约定履行其对保险标的安全应尽责任的，保险人有权要求增加保险费或者解除合同
The nurse is caring for a client with diabetes mellitus. When teaching the client about foot care, which instruction should the nurse provide ？（）
A．Examine feet once per week for redness, blisters, and abrasions.
B．Apply lotion to dry feet, especially between the toes.
C．Avoid hot-water bottles and heating pads.
D．Dry feet vigorously after each bath.
