问题 选择题

已知某硫酸、硫酸铜、硫酸铁的混合液100mL中,各种阳离子的物质的量浓度相等,硫酸根离子的浓度为6mol•L-1,则此溶液中可溶解铁粉的质量为(  )

A.5.6g

B.11.2g

C.16.8g

D.22.4g

答案

n(SO42-)=0.1L×6mol/L=0.6mol,

溶液中各种阳离子的物质的量相等,设阳离子的物质的量分别为xmol,根据电荷守恒可得:

x+2x+3x=2×0.6,

解得x=0.2,则

2H++Fe=Fe2++H2

0.2 0.1

Cu2++Fe=Fe2++Cu

0.2 0.2

2Fe3++Fe=Fe2+

0.2 0.1

共消耗0.1+0.2+0.1=0.4molFe,

其质量为0.4mol×56g/mol=22.4g,

故选D.

阅读理解与欣赏

阅读文章,回答问题。

(甲)

  正当我欣赏远处美丽的帆影时,耳畔响起一位哲人的讽喻:“朋友,走近了你就知道,即使在最美丽的帆船上也有着太多琐屑的噪音!”

  这是尼采对女人的讥评。

  可不是吗,家太平凡了,再温馨的家难免有俗务琐事、闲言碎语乃至小吵小闹。

  那么,让我们扬帆远航。

  然而,凡是经历过远洋航行的人都知道,一旦海平线上出现港口朦胧的影子,寂寞已久的心会跳得多么欢快。如果没有一片港湾在等待着拥抱我们,无边无际的大海岂不令我们绝望?在人生的航行中,我们需要冒险,也需要休憩,家就是供我们休憩的港湾。在我们的灵魂被大海神秘的涛声陶冶得过分严肃以后,家中琐屑的噪音也许正是上天安排来放松我们精神的人间乐曲。

  傍晚,征帆纷纷归来,港湾里灯火摇曳,人声喧哗,把我对大海的沉思冥想打断了。我站起来,愉快地问候:“晚安,回家的人们!”

                                                                          (乙)

  对于我来说,家的概念随着年龄的变化而不断变化。

  在童年的时候,家是一声声呼唤。那时的我似乎比今天的孩子拥有更多的自由,放学后不会先在父母前露面,而是与居住相邻的同学聚在一起,天马行空,玩得天昏地暗,直到炊烟散去,听见父母“喂,回家了,吃饭了”的呼唤才回家,这样的声音伴着我慢慢长大,日复一日,至今仍在我的耳边回响。

  一转眼,童年过去了,当胡须慢慢从嘴角长出,家又成了一个想逃脱的地方。

  书看多了,世界也变大了,一张床小了,父母的叮咛也显得多余了,盼望着什么时候我能拥有自己的天空。后来,穿上了绿色的军装,来到了部队,家又变成了一封封信笺,每次收到信后,是最想家的时候。走上工作岗位之后,开始“受伤”,开始在人海中翻腾,开始幻想着飞到远方的家中。在推开门的一瞬,让自己泪流满面。此刻,世界很大,而我所需要的,只是家中那种熟悉的味道,那窗前一成不变的风景……远离母亲,在外省生存,工作之余便有无数个周末无处打发,手中的电话本很厚,从头翻到尾,却没有一个号码是为我此时准备的。这个时候,家又变成了自己要和另外一个人建立的那一个新的小家。

  从相识、相恋到相拥,一个平凡的日子里,我拥有了一个平凡的家。我和妻子在这个小家里认真地生活、认真地吵架又认真地和好。在一点点小快乐、小矛盾中,日子一天天过去。在此时,家的概念又变了,它是深夜回家时那盏为你点起的灯,是傍晚你看看书我看看电视偶而交谈几句的那种宁静,是一桌胃口不好时也吃得下的饭菜,是得意忘形时可以呼朋唤友可以张口说粗话的地方。不久,我成了父亲,我和一个新的生命在家中相逢,一种奇妙地感受充斥我的心,小生命开始让我“玩物丧志”,想挣脱却又那么愿意沉溺其中,那是一种用幸福来缚住你的力量。家的概念在不停地变换着,生命在这种变换中匆匆地走着。众多的概念中,家有时也意味着悲伤,比如当年父亲的辞世,便让我知道,世界对你的伤害加在一起有时也不如家中的变故给你的伤害大。然而在家中,你也会感受到一种坚强,比如父亲过世后,柔弱的母亲开始变得坚强,她带着我们哥儿俩,一步一步地从变故中走出,之后,家又重新“站立”了起来,又变得祥和,变得不再阴云密布。在这个过程中,家又像是一种生命力顽强的植物,野火烧不尽,春风吹又生。

  生命起步虽久,前路却还遥远。家的概念还会变换,有时是自己的,有时是芸芸众生的。(白岩松《家在途中》,有删改)

1.甲、乙两文都认为“家”是“平凡”的,为什么?

_____________________________________________

2.请谈谈你对甲文中画线句子的理解。

如果没有一片港湾在等待着拥抱我们,无边无际的大海岂不令我们绝望?

_____________________________________________

3.乙文中,“家”的内涵在不断变化,请分条概括出来。

_____________________________________________

4.甲、乙两文都形象地表达了自己对“家”的爱,让人感动。家在你心中是怎样的?请写出你的感受。(要求:有真情实感)

_____________________________________________

填空题

Bill Gates receives honorary knighthood


Britain’s Queen Elizabeth stands with Microsoft chairman and philanthropist Bill Gates after presenting him with an honorary knighthood at Buckingham Palace, London, March 2, 2005.
Sir Bill Not quite. Proclaiming himself "humbled and delighted," Microsoft founder Bill Gates received an honorary knighthood Wednesday from Queen Elizabeth Ⅱ—an accolade that allows the recipient to use "KBE" after his (1) , but not to put "Sir" in front of it.
One of the world’s richest men, Gates, 49, was (2) honored for his charitable activities around the world and his contribution (3) enterprises in Britain.
Past recipients of the honorary knighthood (4) from Irish singer Bob Geldof to former U.S. President Ronald Reagan.
"This (5) is particularly poignant given the deep connections Microsoft enjoys (6) the United Kingdom," said Gates, whose company employs about 2000 people in (7) .
Gates’ royal honor—bestowed by the queen on the advice of the (8) —was announced in January 2004, but a "mutually convenient" date to (9) it had not been available until now.
British recipients of knighthoods are entitled to be (10) with a "Sir" before their names. The honor was long the (11) of senior soldiers, judges and other servants of the state, but recent years have seen the creation of Sir Paul McCartney, (12) Mick Jagger and Sir Elton John.
As an American, Gates is not entitled to use (13) before his name, but he can put the initials KBE—Knight Commander of the (14) Empire—after his name.
Gates joins a roster of American (15) that includes former presidents Reagan and George H.W. Bush, comedian (16) Hope, retired U.S. Army Gen. Tommy Franks and former Secretary of (17) Colin Powell.
Gates said he was proud of what he called (18) "special relationship" with Britain.
"The U.K. was the first country in (19) Microsoft set up a subsidiary outside the U.S., and our experience in the (20) has been significant in shaping our international growth," he said.
Microsoft’s British facilities include Research Cambridge, a laboratory established in 1997 in the university town that employs 80 scientists. In 2000, the Bill & Melinda Gates Foundation announced a donation of $210 million to Cambridge University to create a scholarship program for graduate students from outside Britain.