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- 1如图在三角形abc中,边AB,AC的垂直平分线交与点O,求证：点O也在BC的垂直平分线上
- 24.67*1.8+46.7*0.18 简便计算
- 3What ___ you ___ (do) tomorrow?I ___(go) to the movies.用are going to 还是 will?为什么?
- 4I often saw you play basketball in the summer holiday.这里为什么用saw,不是和 often重复了吗?
- 5His sister likes to be a music.提问his sister ____ _____to be a musician?
- 6一个氧原子的质量为2.658×10的－23次方g,一个氢原子的质量为1.67×10的﹣24g,一个氧原子约是一个氢原
- 7what is your friend's------- --------- [最喜欢的运动】
- 8_____orange would you like to have?----Two glasses ,please A How many B how much
- 9下列各组量不随着原子序数的递增而呈周期变化的是
- 10一根铁丝可以围成一个半径是3厘米的圆，如果用它围成一个等边三角形，这个三角形的边长是（ ）厘米. A.18.84 B.6.28 C.3.14