抽样调查的误差可包括（）。
A.系统性误差
B.登记性误差
C.偶然性误差
D.责任性误差
E.技术性误差
参考答案：A, B, C
_______ English has changed a lot over time and ______ English spoken between about AD 450
and 1150 was quite different. [ ]
A. / ; the
B. / ; /
C. The; /
D. The; the
读一读，排列顺序，使之成为完整的句子。
1. ① Where ② your ③ body ④ is
__________________________________________________
2. ① to ② you ③ Nice ④ meet
3. ① Look ② me ③ at
4. ① This ② Mike ③ is
