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- 1potato chips
- 2We play in at school with our friends.It's relaxin.3Q
- 3设A是sxn矩阵,B是由A的前m行构成的mxn矩阵,证明:若A的行向量组的秩为r,则r(B)>=r+m-s.
- 4请问物体在作圆周运动时其加速度的方向与大小变化如何(一定或者可能变化)?
- 5甲乙两班人数之比是4|1,如果从甲班调10位学生到乙班,则两班人数之比变为7|2,那么原来两班各有多少人?
- 61.25*123-125*19.93+1.
- 7His sister is a [ ].She works in a hospital.
- 8月的汉语拼音怎么拼
- 9一个铁球的质量为79克,量筒中水的体积60立方厘米,放入铁球后水的体积75立方厘米,算出空心部分得体积.
- 10Many people in China or in the US will never have the opportunity to take part in the new international economy because