根据照度平方反比定律，当距离增大到为原有值的两倍时，其照度即减少到（）
A.照度不变
B.1／6
C.1／8
D.1／4
E.1／2
参考答案：D
促进高标准的职业服务，正直、诚实的履行职责，支持行业跨越式发展。
Which nursing diagnosis would be the most appropriate for a client with coronary artery disease (CAD)（）
A. Ineffective thermoregulation.
B. Impaired gas exchange.
C. Risk for injury.
D. Decreased cardiac output.
