题干

下列各式中,错误的是(    )。

A:78×85×17=78×(85×17)

B:28×101=28×100+28

C:125×16×25=125×8+8×25

D:496-78-22=496-(78+22)

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答案(点此获取答案解析)

C

同类题1

完形填空

    What would your life be like without phones?

    In one of my classes today we discussed the question of how our lives would be without a mobile phone. I actually felt quite sad to hear how some kids cannot1 without their phones these days.2, I think nowadays we are controlled and 3by our technology to keep up. So let's see some of the points that 4 in the debate and see if our generation really is addicted(上瘾的) to electronic connections 5 true communication.

    It is true that everything 6 at a fast pace these days. For example, you can contact someone who lives on the other side of the world within 7. This is great if you think about how connected we can stay to the 8 who are far away from us. However, on the contrary, can we be too connected to the people who are 9 to us? An argument arose about the 10 that it is easier to message someone from your sofa than to meet them 11and talk. Social skills are12 to have and if you are not going to put effort into real-life13, then you are not going to 14 in this ability.

    Another point was that phones are very handy for 15 something that you are wondering about. For example, if you don't know a word in another language, you can 16 and simply use an on-line translator to help you out. This can be very 17 in many situations, but it can also make a person dependent on the 18.

    All in all, this question is very interesting to19 as we become day by day more dependent on technology. We should realize how much we really need to be connected with our phones while considering the 20 and damage it can cause us.

同类题3

阅读训练

会飞的蒲公英

      童年的我,在初夏,常常和妈妈去小木屋后面的山坡。山坡上盛开着一丛丛火红的杜鹏、鹅黄的迎春、淡紫的牵牛……我快活地拍着小手,蹦蹦跳跳采摘这些五颜六色的花儿,可妈妈却总是轻轻地挽着我走到山坡的另一侧,那里开满着一朵朵白色的小花。花儿怪逗人的:圆圆的脑袋,白白的茸毛,风一吹,就轻________(yíng)地飞了起来,飞呀飞,飞得老高老高的,我费了好大的劲,才抓住一朵飞在空中的小白花。

  妈妈说:“这是蒲公英,它从不满足于呆在偏僻的角落,最喜欢到外面的世界去闯荡。”妈妈的话,在我幼小的心灵里留下了很深的印象。晚上,我常常梦见自己变成了一朵白色的蒲公英,在广阔的世界上空飘荡。

  不久,我上小学了,妈妈缝了个花书包给我,书包上绣着几朵白色的蒲公英,花旁还歪歪斜斜地绣着几个字--会飞的蒲公英。每天,我就像一朵快乐的蒲公英,在小木屋到学校的山路上飞来飞去。

  一个有风的黄昏,我从学校跑回家,高兴地拉着妈妈来到开满蒲公英的山坡。我把老师刚刚教的儿歌《蒲公英的种子》唱给妈妈听,我一边喝一边在蒲公英丛中跳来跳去,一朵朵白色的小花在我的歌声中轻轻飘上了天空。妈妈的神情有些激动,目光亮亮的,深情地追随着那一朵朵飘飞远去的小白花。

  从妈妈的目光里我仿佛看到了晚上常常做的那个梦:一朵白色的蒲公英,在轻风的吹送下,飞呀飞,飞过一间间古旧的小木屋,飞过一片片茂密的山林,飞进金色的阳光中……带着这个白色的梦,我考上了中学。那个绣着蒲公英的花书包旧了破了,有几个深夜,妈妈把花书包放在桌子上,望了好久好久。后来,妈妈又守着小油灯,为我做了一件蓝色连衣裙,裙上绣着一朵白色的蒲公英。每天,我穿着蓝色的连衣裙,在学校和山村的大马路上飞来飞去。

  几年之后,一张从遥远的地方飞来的大学录取通知书,使我那关于蒲公英的梦是真切了。临别前的一个黄昏,风很大,妈妈和我不知不觉来到了小木屋后的山坡,山坡上一朵朵蒲公英飞得比以往更高了。我惊讶地睁大了双眼,妈妈站在离我不远的地方,眼睛里含着泪花。暮色渐浓,我和妈妈默默地往回走,快到小木屋时,妈妈拉了拉我的手,轻轻地说:“孩子,你算是一朵会飞的蒲公英了,但你还要飞得更高一些。”

从此,我牢牢记住了妈妈的话,开始尽情地在大学的林阴小道上飞来飞去。

      一年后,我把从林阴小道上飞进报纸和杂志的诗行寄给了山里的妈妈,并写了一段话:“妈妈,从你身边飞出的那朵娇________(nèn)的蒲公英,不仅学会了飞,而且还懂得怎样才能飞得更高了。”     

      很快,妈妈回信了,信里夹了一幅水彩画:一片蓝色的天空下,有一座开满了白色蒲公英的小山坡。画上题有一行字:山里的孩子。

  从这幅画里,我读出了妈妈心中那片诚挚的向往——蓝天下,一群群孩子,明亮的双眸,痴痴地凝望着山坡上一朵朵白色的蒲公英,口里欢快地唱着:我是一颗蒲公英的种子……~

  这不正是每一个山里母亲期待的吗?