如图所示，把一根绳子对折成线段AB，从P处把绳子剪断，已知AP=PB，

如图所示，把一根绳子对折成线段AB，从P处把绳子剪断，已知AP=PB，若剪断后的各段绳子中最长的一段为40cm，则绳子的原长为( )

A．30 cm B．60 cm C．120 cm D．60 cm或120cm

答案

相关题目

Nick is a fourteen-year-old boy. He is in Grade Eight. He doesn't do well in hi

Nick is a fourteen-year-old boy. He is in Grade Eight. He doesn't do well in his lessons. But he is tall and strong, and he is good at sports. Basketball is his favorite. Now his father and mother w

石墨炸弹爆炸时能在方圆几百米范围内撒下大量石墨纤维，

石墨炸弹爆炸时能在方圆几百米范围内撒下大量石墨纤维，造成输电线、电厂设备损坏。这是由于石墨( )A.有放射性 B.易燃、

农作物生长过程中松土有利于生长，原因是 ①土壤中硝化细

农作物生长过程中松土有利于生长，原因是 ①土壤中硝化细菌的硝化速率加强 ②松土使农作物能吸收矿质元素 ③松土使呼吸作用产生ATP多 ④松土

---________? ---He is quiet and doesn’t like talking much.A. What would

---________? ---He is quiet and doesn’t like talking much.A. What would he like? B. What does he look like? C. What’

已知▱ABCD中，AB=4，AD=2，E是AB边上的一动点，设AE=x，DE延长

已知▱ABCD中，AB=4，AD=2，E是AB边上的一动点，设AE=x，DE延长线交CB的延长线于F，设CF=y，求y与x之间的函数关系．

将下面一句话准确、规范、美观地书写在下面的田字格中。

将下面一句话准确、规范、美观地书写在下面的田字格中。（2分）树欲静而风不止，子欲养而亲不待

—Wow! How beautiful！________ flowers are these?—Today is Mother's Day.They

—Wow! How beautiful！________ flowers are these?—Today is Mother's Day.They are for ________， Mum.A．Which; you B．Which; yours C．Whose; yours D．Whose; you

设质点M按规律s=3t2+5作直线运动，则质点M( ) A.在t=1

设质点M按规律s=3t2+5作直线运动，则质点M( ) A.在t=1时的瞬时速度为11 B.在t=2时的瞬时速度为12 C.在t=3时的瞬时速度为13

如图所示，把一根绳子对折成线段AB，从P处把绳子剪断，已知AP=PB，

答案

相关题目

最新题目