惠安石雕是以硬质的（）为主要原料的传统雕刻艺术。
A、青石料
B、寿山石
C、大理石
D、花岗岩
参考答案：A
A () is a collection of projects and other work that are grouped together to facilitate effect -ive management of thatwork to meet strategic business objectives.
A、program
B、portfolio
C、project of large size
D、PMO
传动系统的要求是：起动、（）；起动力矩大；噪声小；便于安装、调试和维修。
