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- 1客车和货车同时从甲,乙两地的中间向相反方向行驶,3小时后,客车到达甲地,货车离乙地还有42千米.已知客车和货车速度比是7：5.甲,乙两地相距多少千米?
- 2Jenny will leave for Beijing next week.（同义句
- 3设a>0 ,任取x1>0 ,令xn+1=1/2(xn+a/xn) (其中n=1,2…… ).证明数列{xn} 收敛
- 4在一个周长为32分米的正方形内画一个最大的圆,这个圆的面积是正方形面积的多少?
- 5Do you a___ with me about the need for more schools?
- 6The news came as no surprise to me.I ______ for some time that the factory was going to shut down.
- 7食堂有大米300千克,第一天吃了5/1,相当于第二天的5/3,第二天吃了（ ）.
- 8一个盒子里装有红、黄、蓝、黑四种颜色的球各20个……
- 9引导原因状语从句是since和as的区别
- 10如果物体先向右运动5M,在向左运动5M,那么物体共运动了几米?此时物体在距离起点的什么位置?