从总的体质特征看,元谋人和北京人属于 [ ]
A、猿类
B、古猿
C、猿人
D、现代人
答案:C
1Cr18Ni9Ti是奥氏体型不锈钢,需采用固溶处理,以获得单相奥氏体,为了阻止(CrFe)23C6沿晶界析出,还应进行()热处理.
The seller should guarantee that the commodities comply ______ the quality, specification and preformance as stipulated in the contract.
A.for B.inC.to D.with