— ____________ are they?
— They are thirty dollars. [ ]
A. How many
B. How much
答案:B
论述玻璃态物质具有的五个特性。
发生压疮最主要的原因是()
A.皮肤潮湿
B.营养状况差
C.皮肤受排泄物刺激
D.体温升高
E.局部组织长期受压