哪项不是抽样调查时抽样的方法（）
A.随机抽样
B.分层抽样
C.多级抽样
D.整群抽样
E.随意抽样
参考答案：E
—I________ some new CDs.
—When_________ you_________ them?
—Yesterday morning. [ ]
A. buy; did; buy
B. buy; do; buy
C. have bought; will; buy
D. have bought; did; buy
普通护照的登记项目有哪些？
