一般汽车的内倾角度为()
A.0~3度
B.3~5度
C.4~7度
D.6~10度
参考答案:D
先化简,再求值:
2x3+3x2y-xy2-3x2y+xy2+y3,其中x=1,y=-2。
Last night's TV news said that by then the death of the missing people______(未证实) yet. (prove)