6x2-5xy+6y2是______次______项式．
6x2-5xy+6y2称为2次三项式．
故答案为2，三．
现在有的汽车行驶记录仪能够实现对车辆的跟踪、监控及防盗报警等功能。（）
15.At the meeting, a proposal that he should take charge of the project _____.
A．put forward
B．came up
C．came up with
D．Showed
