普惠制产地证是为了取得关税减免优惠，而纺织品产地证是进口国海关控制配额的依据。（）
参考答案：对
8小时18分=______分1080立方分米=______立方米．
Tom is only three years old, so he _____.[ ]
A. can't look at him
B. isn't able to look him after
C. can't to look after him
D. isn't able to look after him
