职业技能是指从业人员从事职业劳动和完成岗位工作应具有的()。
A.职业操守
B.职业能力
C.职业习惯
D.职业技术
E.职业知识
参考答案:B, D, E
--How long ___________ each other before they__________ married?
--For about a year.
A.have they known;get
B.did they know; were going to get
C.do they know;are going to get
D.had they known; got
长期肠外营养常见的并发症是()
A.胆囊结石
B.胃癌
C.肝硬化
D.Crohn病
E.肝癌