PE的专业术语名称是聚氯乙烯（）

A.PE

B. PS

C. PVC

D. PET

A.PP膜

B.PE膜

C.PVC膜

D.pvc膜

A.聚乙烯

B.聚苯乙烯

C.聚氯乙烯

D.聚丙烯

PVC表示的相应化工产品的名称是()

A.聚乙烯

B.聚氯乙烯

C.聚丙烯

D.聚苯乙烯

A.KKR

B.NVCA

C.ARDC

D.MBO

A.聚乙烯

B.聚氯乙烯

C.聚苯乙烯

D.聚碳酸脂

创建一个名为student的新类，保存新类的类库名称是mylib，新类的父类是Person，正确的命令是

A．CREATE CLASS mylib OF student As Pemon

B．CREATE CLASS student OF Pe~on As mylib

C．CREATE CLASS student 0F mylib As Pe~on

D．CREATE CLASS Person OF mylib As student