车钩缓冲装置装置有哪些基本组成？
参考答案：车钩缓冲装置由车钩、缓冲器、钩尾框、从板等零部件组成。
John's mother used to be very _____ about what she wore，although her family was not that rich.
[ ]
A．curious
B．special
C．particular
D．anxious
“八议”制度载于律文，最早出现于哪个时期()。
A.魏朝
B.宋朝
C.北齐
D.唐朝
