你能帮帮他们吗
精彩回答
I ________ in the city since I left school. I like this city very much now.
1年前
“Mobile phone killed my man,” screamed one headline last year.
1年前
Sixteen years ago a boy gave me an important gift.
1年前
已知a,b∈R且ab≠0,若(x﹣a)(x﹣b)(x﹣2a﹣b)≥0在x≥0上恒成立,则( ) A . a<0 B . a>0 C . b<0 D . b>0
1年前
绘制三维曲面z=sin(x)cos(y)图中的z>0.35 部分图形,其中0≤x,y≤2π.用matlab画
1年前