成本系数是加工后原料单位成本与成品价格的比。
参考答案:对
—Hi, Jack! I never thought I would meet you here. _______?
—Fine. Thank you. And you?
A.How is your job
B.How are you getting on with your new job
C.Lovely weather, isn't it
D.How are you
下列关于闭塞性周围动脉粥样硬化的叙述中,错误的是()
A.好发于男性
B.好发于青年人
C.好发于下肢动脉
D.与冠心病一样有高血压、高血脂等危险因素
E.行走疼痛-休息-缓解是其病程中一个典型的临床表现