在一定温度下的定容密闭容器中,当下列物理量不再变化时,表明反应已达平衡的是[ ]

题型:不定项选择题

问题:

在一定温度下的定容密闭容器中,当下列物理量不再变化时,表明反应已达平衡的是[ ]

A.混合气体的压强

B.混合气体的密度

C.B的物质的量浓度

D.气体的总物质的量

考点:达到化学平衡的标志
题型:不定项选择题

(一)阅读下面语段,完成16-24题。

仙人球小记

⑴圆圆的,绿色的大肉球,从花盆里伸出来;又笨拙,又滑稽。我对它无甚所知,只知道多浇水,便猛涨;不浇水,亦不死。是艰苦地方磨练出来的老疙瘩,只想活不想死的赖皮。倾服它的魅力,我愈是不会养花,愈是指望养它。但所见都是别人的。想讨,难以启齿——揣度别人也像我一样爱它。

⑵有一天下班回来,见门前台阶边有一珐琅铁碗,碗内盛土,一个绿盈盈以棕色硬刺的小东西,它即是仙人球。惊喜不置,连忙询问来由,却是母亲从垃圾堆里拾得。

⑶于是赶忙浇水。天天工余都要看上一会,希望快长。然而它不慌不忙,慢条斯理地,半年才长了一丁点。早晚天冷,把它拿到厨房里,出太阳的时候,又拿出来接受光合作用。这么每日搬来搬去,不厌其烦。

⑷有一天,球不翼而飞。估计可能是晒太阳时,被谁家的小孩子拿去玩了。丢就丢了吧,想也无益。盆土亦不倒掉,也许妈妈会在垃圾堆里再拾来一个。

⑸春节大扫除,妻负责厨房清理,伸手掏一处间壁夹缝。大叫,被什么咬着了。他估计是小老鼠。于是我自告奋勇,一手举拖鞋,做出致命一击的姿势;另一手伸进去擒拿。很顺利。抓出来一看,却正是不翼而飞的仙人球!大约是“搬来搬去”的时期,无意间在厨房撞落,滚落在那儿,当时匆匆未察。它离盆两个月,也不见瘦,容颜尚好,刺儿硬着呢。于是请回原盆,依然浇水将养。

⑹又过半年,有朋友提到,他的仙人球开了花,我过去不知道仙人球能开花,羡慕不已。问其球有多大?他双手合拢一比,比我的要小。于是断定,是因为品种不同。下了班,便对家中的劣种百般看不顺眼。

⑺“喜新厌旧”的念头一生,便忍不住行动向那位朋友讨良种,恰巧他的球上已萌生小球,才一个玻璃珠子大。便急不可待,要回来,放在一个新买的陶盆里,郑重以待。失宠的那个,已经拳头大,不再浇水,并拟丢弃。妈妈舍不得,毕竟是他老人家从垃圾堆里擢升起来的,且又是我的初相识——想及此,留下劣种也可以。

⑻又过一年,朋友给我的那个宠儿,已经拳头大了,盛暑7月,还不见有花开。而原先那个劣种,却显出异象。妈妈连呼奇怪。我去察看,只见这球的侧边,一连生出4个毛茸茸的棕色东西,象粗毛笔头,不知将有何做作,很有点吓人。

⑼又过5天,欣然从那毛里钻出4个白色花蕾来!

⑽于是大欣喜过望。赶忙连土从铁盆填进陶盆,以示珍重,并放在书桌正中,以便在房间的任何角度,都能看到它的进展,只可惜他一年饱受“饥遇”之苦,体积并没见长。

⑾晚上,4个花蕾偷偷开放了。开得那么美,一时象牙雕的少年手中的喇叭,一时又象美人身上的白裙。仿佛有音乐从中悠悠飘出,在灯的辉映下,在夜这么宁静的时候!

⑿我欢欣不能自已。除了请妈妈和妻环坐赏玩以外,又赶快把邻楼的朋友拉来,一同高兴。拿一碟炒花生豆,两杯黄鹤楼老牌汉汾,与朋友对饮,互念祝酒词,也愿我们自己的生命开出花来。

⒀平时并不爱看花的妻,今天也格外凑趣,在我身边坐着,看着我微笑。她显然是为我之乐而乐。“只恐夜深花睡去,故烧高烛照红妆。”这一夜,在静静的灯光里,我陪了她很久,很久。为了明日有个好的工作精力,才并不情愿地睡下。

⒁后查书,记着,仙人球不论大小,非得够了年头,才能吐蕾。我错怪了这所谓的“劣种”了。抚摸着花盆,心里有许多对不住它的话。

小题1:.《仙人球小记》这篇散文记叙了      作者在字里行间抒发了     

小题2:.仙人球开花或不开花取决于    ,而不是看其     ,作者因小球开花,大球而不再开花而断定良种和劣种,这种主观臆断违反了           

小题3:.把文中划线短语中加点字的解释写在括号内。  

甚(  ) 翼(   ) 已(  ) 待(  )

小题4:.把下列句子中画横线的两个词语分别用相同意思的两个词语代替。

“有一天,球不翼而飞。估计可能使晒太阳时,被谁家的小孩子拿去玩了。”

估计                              

可能                              

小题5:.“是艰苦地方磨练出来的老疙瘩……”一句中的“疙瘩”与上文中的        一词相呼应。

小题6:.本文多处运用拟人手法,请摘录两句,并说说这些句子寄寓了作者怎样的思想感情。

小题7:.“晚上4个花蕾偷偷开放了”中“偷偷”一词意思是           

小题8:.请在文中摘录融合了想象联想比喻的句子。

小题9:.读了本文,你对仙人球有了哪方面的了解?

题型:不定项选择题

第三部分阅读(共两节,满分40分)

第一节:阅读理解(共15小题;每小题2分,满分30分)

阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项。

In 2008, the main candidates(候选人)for President each used this expression: “You can put lipstick(口红)on a pig, but it is still a pig.” This means that it is a waste of time to change something from ugly or unpleasant–looking to beautiful.

There are other expressions about improving a pig’s appearance, like this one: “A hog in a silk waistcoat is still a hog.” Hogs are similar to pigs, only bigger. Americans use many other expressions about pigs, hogs and female hogs called sows, like this one, “You cannot make a silk purse out of a sow’s ear.” This means you cannot create something valuable from something that has no value. Then there is the expression “Cast pearls before swine(猪).” That means wasting something valuable on someone who will not be thankful or care about it.

Hogs, which are very large animals, take up a lot of space but people should not take up more than their share. If one of your children is taking up too much space sitting in front of the television, other children might say: “Do not hog the couch.” And a road hog is a driver who uses more than his share of the road. Such a driver increases dangers for other drivers.

Pig terms are also used in American politics. Farmers mark their pig’s ears to identify them. In politics, earmarks are money set aside for projects in a congressman’s home state.

In many areas, pigs provide ham, bacon and other pork products to eat. All Americans want to be able to bring home the bacon because they want to earn enough money to provide the necessities of life. Experts say this term was first used in the 1920s. But it is believed to come from the much older game of catching a greased(涂了油的)pig. This was a popular event at country fairs in which the winner was awarded the pig.

41. The author writes this passage mainly to _________.

A. express his support for the Presidential Election

B. introduce some expressions used in Americans’ daily life

C. criticize the bad influence caused by expressions about pigs

D. discuss some problems caused by expressions about pigs

42. If you give a good book to a person who can’t read, which of the following is the most suitable to describe it?

A. Cast pearls before swine.

B. You can put lipstick on a pig, but it is still a pig.

C. A hog in a silk waistcoat is still a hog.

D. You cannot make a silk purse out of a sow’s ear.

43. A driver who takes up too much space on the road is often referred to as _________.

A. a greased pig                                         B. a couch hog

C. a road hog                                             D. a road earmark

44. How many words which refer to the same animal are mentioned in this passage?

A. Three                    B. Four                     C. Five                      D. Six

45. Which of the following expressions are similar to “You cannot make a silk purse out of a sow’s ear.”?

A. When pigs fly!                                            B. To eat like a pig

C. To sell a pig in a pork.                                 D. To sweat like a pig.

题型:不定项选择题

患者,男,20岁,在2楼擦窗时不慎坠落地面川、时后送至医院。诉腰背部疼痛剧烈,双下肢活动良好

检查显示L1椎体压缩性骨折,椎体压缩小于1/2,最佳的治疗方案应是()。

A.手术减压,脊柱内固定术

B.高低两点法过伸复位,石骨背心固定

C.手术相应椎板使脊髓得以减压

D.颅骨牵引并使用激素及脱水药物

E.手法复位并行推拿治疗

题型:不定项选择题

休克患者经扩容治疗后,测中心静脉压20cmH20,血压80/50mmHg,应考虑

A.容量血管过度收缩

B.血容量严重不足

C.容量血管过度扩张

D.心功能不全

E.心功能恢复

题型:不定项选择题

在监测颅脑损伤患者的生命体征时,为避免患者躁动影响准确性,应先测血压,再测呼吸,最后测脉搏。()

更多题库