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- 1______his arrival at the classroom on his first day at school,the teacher _______.
- 2摆一个正方形需要4根小棒,摆2个需要7根小棒,摆3个需要10根小棒,摆n个正方形需要多少根小棒?
- 31x2+2x3+3x4+4x5+5x6---+99x100=?
- 4一、把下列句子中打括号的部分换成一个成语.
- 5Mr Smith comes from Australia .(对Australia提问)
- 6They have made much progress_____ their hard work
- 7一个数由7个100,9个1,2个0.1和4个0.001组成的,这个数是(),把这个数精确到百分位约等于().
- 8若PQ是线段AB上的两个黄金分割点,且PQ=40(⺁5-2)求AB的长
- 9Kate is good _______.A.in run B.in running C.at run D.at running
- 10一个圆锥形沙堆,底面积是28.26m²,高是2m.用这堆沙在5m宽的公路上铺2cm厚的路面,能铺多少米?