In comparison with PE,()is or are correct.
In comparison with PE,()is or are correct.
A.Nylon has a higher degree of crystallinity, and a higher melting point.
B.Nylon has a higher degree of crystallinity, and a lower melting point.
C.PVC and PAN have higher degrees of crystallinity, and higher melting points.
D.PVC and PAN have lower degrees of crystallinity, and lower melting points.
正确答案:Nylon has a higher degree of crystallinity, and a higher melting point.; PVC and PAN have higher degrees of crystallinity, and higher melting points.
Tag:材料导论
时间:2021-12-31 13:06:28