根据 JB4708—92《钢制压力容器焊接工艺评定》的规定,当试件母材金属的厚度大于20mm时,应进行()。
A、冲击试验D
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Withsuchapoorscoreintheentranceexam,it’s________impossibleforhimtobeadmittedtothisuniversity.
Howmanypartsdoesascienceandtechnologypaperconsistof?Whatarethey?
重型腹泻不同于轻型腹泻最主要的是()
句子写作:Suchanattitudewouldemphasizethevalueoflife.
Itisnousearguing_______theplanbecauseithasbeenrejected.