治疗血友病B的出血输注凝血酶原复合物应:()
A.每8h一次
B.每12h一次
C.每天一次
D.隔天一次
E.每周两次
参考答案:C
All workers, regardless of their sex and education, are required to ______ at the age of 60.
A.resign
B.retire
C.regain
D.retain
定修模型设定的依据是()
A.工艺特点
B.维修体制
C.生产经营计划
D.设备技术状况
E.维修费用