由45%丙稀、35%乙稀、20%已丁稀组成的共聚物
查看答案
一种强化复合地板,规格700mm×190mm×10mm,由耐磨层(三氧化二铝膜)、表层(印木纹的纸)、基层(干法生产的中密度纤维板,密度0.85g/cm3,厚9.5mm)、背板平衡层(一种纸)经树脂浸渍后高温强压复合而成,边、端制成榫接企口以便于安装
M: What a beautiful necklace! Is it newW: No, my boyfriend bought it for me four years ago. When did the woman get the necklace().
A. Five years ago.
B. Four years ago.
C. Six years ago.
D. Not long ago.