在我国不能用于食品工业的塑料是()。
A.聚氯乙稀塑料
B.聚苯乙稀塑料
C.聚乙稀塑料
D.三聚氰胺甲醛塑料
E.聚丙稀塑料
参考答案:A
________in the queue for half an hour, the old man suddenly realized he had left the cheque in the car.
[ ]
A. Waiting
B. To wait
C. Having waited
D. To have waited
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