英语选择提加数学题1.jim_his watch in the classroomA.left B.forget C.l
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英语选择提加数学题
1.jim_his watch in the classroom
A.left B.forget C.leave D.forgot
2.Let's go fishing,
A.will you B.don't you C.won't you D.shall we
在一个边长为10厘米的立方体上挖一个直径为13厘米的圆洞,要求这个圆洞能通过直径为13厘米的圆木球.怎样做?
1.jim_his watch in the classroom
A.left B.forget C.leave D.forgot
2.Let's go fishing,
A.will you B.don't you C.won't you D.shall we
在一个边长为10厘米的立方体上挖一个直径为13厘米的圆洞,要求这个圆洞能通过直径为13厘米的圆木球.怎样做?
1. A
2. D
数学题
最简单的方法是在一条体对角线所对应的两个顶点,切下两个底面是等边,顶点是90度的四面体.底面需满足的要求是,它的高是3*R=19.5厘米.
2. D
数学题
最简单的方法是在一条体对角线所对应的两个顶点,切下两个底面是等边,顶点是90度的四面体.底面需满足的要求是,它的高是3*R=19.5厘米.
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