Those students, who have passed the examination, they neednt take the course this term.
查看答案
A hologram is a pattern usually made on film in that can create a three-dimensional image
A microphone enables a soft tone to be amplified, thus making it possible the gentle renditions of romantic love songs in a large hall.
人力资源供给预测结果表明在未来某一时期某些岗位人员短缺应采取的政策和措施
微信支付 
支付宝支付