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- 1在直角坐标系xoy中,i,j分别是x,y轴正方向的单位向量,在△ABC中向量AB=i-2j,AC=2i+j.
- 2Bob is tall and strong.对划线部分提问tall and stong
- 3I am really happy for you 为什么不是to you
- 4筷子的杠杆示意图
- 5abc是三角形ABC的三边长,且满足a的平方+c的平方+2(b-a-c)=0.求各内角度数
- 6not only the teacher but also the students singing songs
- 7四大高原中 有石灰岩的是哪个高原
- 8The bus went slowly yesterday afternoon (划线部分提问)
- 9祖父的园子主要内容
- 10数学手抄报的内容