题目

Wild animals ________ tigers and pandas are becoming rare.       A. as follows                B. for example                     C. such as             D. for instance 答案:C11、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A(2)服装包装袋B(3)塑料牛奶瓶A
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