弹簧储能操动机构具备（）储能两种方式。
A、电动和手动
B、自动和手动
C、电动和自动
D、主动和被动
参考答案：A
在三国两晋南北朝时期的文化艺术中最能体现各民族和中外文化交融的是[ ]
A．绘画
B．书法
C．诗歌
D．石窟艺术
This species has nearly _____ because its habitat has been destroyed by humans. [ ]
A. died out
B. passed away
C. made out
D. put away
