结晶水是粘土矿物晶体构造的一部分,只有温度高于()以上时,结晶受到破坏,这部分水才能释放出来。
A、200℃
B、250℃
C、300℃
D、350℃
参考答案:C
In planning a presentation that advocates a decrease in the client-to-nurse ratio from 8:1 to 6:1, a nurse should emphasize its effect on
A. institutional resources.B. standards of practice.C. client-care quality.D. nursing recruitment.
网上交易可分为哪两个环节?