从下面两种塑料中选择合适的来制造不同的产品(填编号):(A )聚乙烯 (B )聚氯乙烯
(1)食品保鲜膜
(2)服装包装袋
(3)塑料牛奶瓶
(1)A
(2)B
(3)A
Language learning,________ the expert pointed out in his lecture,is more than remembering words and phrases.
A.as
B.which
C.that
D.what
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