题干

看图列式解答.

为了节约钢材,工人师傅把短钢筋焊接起来.

①第三根钢筋长多少分米?

②第一、二根钢筋头尾相接焊接起来长多少分米?

③这三根钢筋头尾相接焊接起来长多少分米?合多少米?

上一题 下一题 0.0难度 选择题 更新时间:2020-04-06 08:46:33

答案(点此获取答案解析)

解:①(9-2)×2=14(分米)

②9+(9-2)=16(分米)

③16+14=30(分米),合3米

同类题1

阅读下文,回答问题

成功

季羡林

       ①什么叫成功?顺手拿来一本《现代汉语词典》,上面写道:“成功:获得预期的结果”,言简意赅,明白之至。

       ②但是,谈到“预期”,则错综复杂,纷纭混乱。人人每时每刻每日每月都有大小不同的预期,有的成功,有的失败,总之是无法界定,也无法分类,我们不去谈它。

       ③我在这里只谈成功,特别是成功之道。这又是一个极大的题目,我却只是小做。积七八十年之经验,我得到了下面这个公式:

       ④天资+勤奋+机遇=成功

       ⑤谈到天资,首先必须承认,人与人之间天资是不相同的,这是一个事实,谁也否定不掉。今天,学术界和文艺界自命天才的人颇不稀见,我除了羡慕这些人“自我感觉过分良好”外,不敢赞一词。对于自己的天资,我看,还是客观一点好,实事求是一点好。

       ⑥至于勤奋,一向为古人所赞扬。囊萤、映雪、悬梁、刺股等故事流传了千百年,家喻户晓。韩文公的“焚膏油以继晷(guǐ),恒兀兀以穷年”,更为读书人所向往。如果不勤奋,则天资再高也毫无用处。事理至明,无待饶舌。

       ⑦谈到机遇,往往为人所忽视。它其实是存在的,而且有时候影响极大。就以我自己为例,如果清华不派我到德国去留学,则我的一生完全不会像现在这个样子。

       ⑧把成功的三个条件拿 来分析一下,天资是由“天”来决定的,我们无能为力。机遇是不期而来的,我们也无能为力。只有勤奋一项完全是我们自己决定的,我们必须在这一项上狠下工夫。在这里,古人的教导也多得很。韩文公说:“业精于勤荒于嬉,行成于思毁于随”。这两句话是大家都熟悉的。

       ⑨我认为,这三方面,是成功的必由之路。

(选文略有删节)

同类题3

根据短文内容,选择正确答案。

                                                                                     C

    Zheng Lin is a Junior 3 student in Shijiazhuang, Hebei. Earlier this month, Zheng and his classmates stood on the street with a box asking people for donations(捐款). Later they gave the money they got to the poor students in their school.

    Many Chinese students raise money to help people in need. Most of the time, they hold a box and ask for donations on the street or in the park. Or they sell things like old books and CDs. Those students have done a great job so far. The money helps the students in poor areas like Yunnan and Gansu with new clothes, pens and pencils.

    Teenagers in the U.S. make donations, too. But they raise money in a different way---they raise money by doing something for others. For example, they sell homemade food or play musical concerts in their neighbourhood to raise money.

     "Chinese students like to wait for people to donate, or sell things that they buy with their parents' money," says Ge Daoshun, an expert. "While U.S. kids get donations and give people something useful in return."

    Ge says Chinese teenagers should learn to raise money in the U. S. kids' ways. "That way, they can show their talents and practice communication. More importantly, they can learn every coin counts(有价值). They have to work hard to get a donation."