生铁可含百分之四的碳.Pig iron may contain 4％ of carbon.独立战争前夕，北美十三州每年生产3万吨生铁。On the eve of the Revolution, the colonies produced thirty thousand tons of crude iron a year.并非一概如此 — 例如从低级铁矿石中生产生铁和钢材的情况一但是这导致了工业发展集中在煤田上.This is not a...
The conformability between E _ 2 - HRP and DCC was 67 %.在15例胃癌中,DCC法与E_2-HRP法的符合率为67%.Objective : To Study the relationship between the expression of DCC and the biologic behavior in colorectal carcinoma.目的: 探讨DCC基因 在大肠癌...