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(    )

A30 cm                   B60 cm                   C120 cm              D60 cm120cm

答案

D

相关题目

The girl wrote a composition without ___. A. ask B. asking C. being asked D. to
The girl wrote a composition without ___. A. ask B. asking C. being asked D. to be asked
A woman named Emily renewing her driver’s license at the County Clerk’s off
A woman named Emily renewing her driver’s license at the County Clerk’s office was asked to state her occupation. She __26__, uncertain how to classify herself. “What I mean is,” explained
储存烟花爆竹的仓库应贴上的标志是 A.B.C.D.
储存烟花爆竹的仓库应贴上的标志是 A.B.C.D.
如图所示,在电场中,一个负电荷从C点分别沿直线移到A点和
如图所示,在电场中,一个负电荷从C点分别沿直线移到A点和B点,在这两个过程中,均需克服电场力做功,且做功的值相同,有可能满足这种做功情况
第二节:书面表达(满分30分) 目前, 学校存在少数考生考
第二节:书面表达(满分30分) 目前, 学校存在少数考生考试作弊现象。某英文杂志社拟对此现象向中学生征文, 标题是“My Opinion on Cheating in Examinatio
下列有关物质应用的说法正确的是 A.漂白粉和明矾都常用于
下列有关物质应用的说法正确的是 A.漂白粉和明矾都常用于自来水的处理,二者的作用原理是相同的 B.MgCl2是强电解质,Fe2O3用作涂料或油漆。 C.生
已知大桶饮用水的价格为7元/桶,七年级一班本学期用了桶水
已知大桶饮用水的价格为7元/桶,七年级一班本学期用了桶水,七年级二班本学期用了桶水,则本期两个班共需交水费                    元
You ______ be driven out of the school if you dare to cheat in the exam.    A
You ______ be driven out of the school if you dare to cheat in the exam.    A. should B. would C. will D. shall

最新题目