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- 1已知扇形的周长是6,圆心角为60°,则扇形的面积是?
- 2we konw there are many places of interest in china can you give us some_____
- 3shoes are under the bed a desk is on the floor的意思
- 4be friendly to sb和be kind to sb用法都一样吗?
- 5当x=2013时,求x的3次方-4x的平方-x的3次方-2x的平方+2x+6x的平方-1 现在要
- 61.请用图表示日食和月食发生时日,月,地之间的位置关系.
- 7The old man with his son_______the street carefully when the traffic light was red.
- 8S=1/1/1980+1/1981+1/1983……+1/2000,求sS的整数部分
- 9钢球浸在长宽分别是12厘米,10厘米的长方体容器里,水由原来的6厘米上升到9厘米,求他的体积
- 10在三角形ABC 中,角C 等于90度,向量AB等于(k,1),向量AC等于(2,3)则k 的值是?