题干

小丽的妈妈要烙5张饼,每次只能烙两张,两面都要烙,每面3分钟.怎样烙最省时间?


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答案(点此获取答案解析)

解:先煎2张,用时为3+3=6分钟;

剩下3张交替煎:设分别为a、b、c;前3分钟煎a、b的正面,中间3分钟煎a的反面和c的正面,

这样a煎好了,后3分钟煎b、c的反面,3×3=9分钟也就烤好了;

一共用:6+9=15(分);

答:煎5张饼至少需要15分钟.

同类题3

阅读理解

    At heart, parents always wish the best for their children, and they work hard for that. Nowadays, we see parents deciding the schools for their little ones before the baby is even born. Once kids starts going to school, some parents want to have a time-to-time update(最新的情况) of their kid's activities. They want to come to their classroom every day, keep an eye on whom they talk to, know the friends they keep, start telling them how to do their jobs, and keep talking to them about everything under the sun. Besides, they send their kids to extra hobby classes, as they want their children to do best in every field.

    When it comes to the education, super mum and dad have all the plans made for their children, and I am sure that they have come up with the best. So, try to fight for the dreams that your parents have seen for you. However, in some cases, it may happen that the kids have some different dreams. Parents sometimes don't even consider the choices of their kids and may force them to do what they wanted to do in life. It's good to plan the future for the children, but leave at least some decisions to them.

    So what should the children do? First, hear out all the plans that your parents have made for you. If you have some different ideas, then sit down and talk to your family about it. Be patient and respect their decisions, but put your plan forth, and make them understand what you want to do and why. Many times, you don't know the difficulties that you may have to face while pursuing your dreams. Ask your parents for suggestions, which will make them feel good and involved. That way, they may support you if you are going on the right path.

同类题4

阅读下面的文字,按要求答题。

                                   远离古典

    我们常常爱听古典音乐,自以为非常感动,自以为听懂了。其实,我们根本没有听懂。我们离古典一天比一天遥远。

    据说,当年歌德听贝多芬的音乐时异常感动,竟热泪盈眶。激恼了贝多芬愤怒地跑过去冲歌德说:你根本没听懂我的音乐!可到了柴可夫斯基的时代,托尔斯泰听柴可夫斯基的音乐,感动得热泪盈眶的时候,柴可夫斯基上前去向托尔斯泰表示衷心的感谢。岁月是一位残酷的雕刻师,无情地雕塑着托尔斯泰、柴可夫斯基和我们,而且将古典一并雕塑得适合于我们和时尚的口味。

     古典一词classic源于罗马上层阶级使用的拉丁语,包含着这样几层意思:谐调、丰富的资源最快的更新优质的服务诚信的运作未经授权,禁止用于任何商业目的。高雅、持久、典范。古典,追寻的是古希腊和古罗马时代的精神,这种精神的追求,实际是对那个时代理想的追求。它带有均匀而有节制、淳朴而纯真的人类原始理想返朴归真。

     歌德自己说:“不爱音乐的人,不配做人。虽然爱音乐,也只配做半个人。只有对音乐倾倒的人,才可完全称作人。”他就是这样认识古典音乐的。他说得极端,过于激情洋溢,离古典的意义遥远,难怪贝多芬对他要愤怒地叫喊。

     激情不是古典。浪漫不是古典。倾诉不是古典。热泪不是古典。

     连歌德和托尔斯泰都离古典遥远,我们可以不必责备自己对古典的误解,不必责备自己对古典的远离。我们也就可以理解了,为什么詹姆斯.拉斯特、保罗.莫里亚将古典的音乐肆意改编成小品加上强烈的打击乐,以为是重返古典或对古典全新的诠解;我们也可以理解了,为什么书摊上摆满了将古典名著断章截句截肢为摘抄和词典,供青年人写情书时参考,以为是挖掘古典对今天的发酵作用;我们也可以理解了,为什么一下子如球迷一样冒出这样多的发烧友,将贝多芬如私家财产藏在首饰盒中一样任其尘埋网封,将巴赫塞进高级组合音响看音响的名版和效果比听音乐本身更兴味浓郁……

     古典被我们简化。古典被我们肢解。古典被我们附庸风雅。古典被我们化为实用。

     听古典音乐,便非常像是看奥林匹克运动会。四年一届的奥运会,我们都是从奥林匹亚山取下圣火,以为重反古希腊的辉煌。其实,我们早已经将奖励给胜利者的橄榄枝叶变成金碧辉煌实用的金牌。我们高举那熊熊燃烧的火炬,同举着一把仿古的打火机没什么两样。我们离奥林匹亚山越来越远,我们却越来越跑得兴致勃勃。

     古典,在远离着我们。我们却以为古典是走进文化高雅层次高档位的一层光滑的涂料、一层珍珠美容霜、一剂养生驻颜的回春药。

     古典,是一种水。我们以为能够制造世上任何一种水:蒸馏水、矿泉水、太空水、纯净水……古典,是圣水,只流自天国、流自心灵、流自遥远的原始人类的青春期。我们人类已经太老了。我们在漫长的成长的历史中赢得了一些什么,也无可奈何地失去了一些什么。

     是的,古典是一种水。我们太爱把它当成一种老酒或美酒,灌装进瓶子或罐子中,或调制成颜色鲜艳的鸡尾酒,斟进高级脚杯中,自以为是珍惜、收藏或品味。其实,我们只是把它当成点缀、摆设、显示和象征。

     古典,确实已经成为了一种象征。