赔偿限额由被保险人根据实际需要提出，经保险人同意后在()中订明。
A.保险凭证
B.保险背书
C.保险合同
D.保单
参考答案：D
Products which are made from dirts and are ________high temperatures are known as ceramics.
A．tempered in
B．subjected to
C．exposed to
D．baked in
护士长根据病人情况、护理人员的数量、水平等进行有效组合，体现了护理排班的（）
A.按职上岗原则
B.公平原则
C.合理结构原则
D.满足需要原则
E.效率原则
