劳动教养，既是行政强制措施，也是一种刑罚方法。 ( )
参考答案：错
紫胶色素是紫胶虫在某种动物体内分泌的一种色素成分。
Could you buy me the same book ________ you gave Tom yesterday?[ ]
A. as
B. that
C. which
D. what
