Economic growth in the world remains weak throughout 2012 and it is hoped that it will _____ gradually in 2013.

A．break up

B．make out

C．work out

D．pick up

监控外场设备中摄像头的主要传感部件是CCD，它具有（）、畸变小、寿命长、抗震动、抗磁场、体积小、无残影等特点。