下列塑料流动性好的有()。
A.尼龙
B.聚乙烯
C.聚苯乙烯
D.聚碳酸脂
E.聚氯乙烯
参考答案:A, B, C
Mr Smith is very strict _____ his work, so he is popular among the workers.[ ]
A. on
B. in
C. with
D. at
简述谭鑫培对京剧艺术发展的贡献。