2017下半年公共英语三级每日必练试题
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Part A
Directions:
Read the following two texts. Answer the questions on each text by choosing A, B, C or D. Mark
your answers on ANSWER SHEET 1.
Text 1
Flying over a desert area in an airplane, two scientists looked down with trained eyes at treesand bushes. After an hour' s flight, one of the scientists wrote in his book, "Look here for probable metal. " Scientists in another airplane, flying over a mountain area, sent a message to other scientists on the ground, "Gold possible. " Walking across hilly ground, four scientists reported,"This ground should be searched for metal. " From an airplane over a hilly wasteland a scientistsent back by radio one word: "Uranium. "
None of the scientists had X-ray eyes: they had no magic power of looking down below theearth' s surface. They were merely putting to use one of the newest methods of locating minerals inthe ground... trees and plants as signs that certain minerals may lie beneath the ground on whichthe trees and plants are growing.
This newest method of searching for minerals is based on the fact that minerals deep in theearth may affect the kind of bushes and trees that grow in the surface.
At Watson Bar Greek, a brook(小溪) six thousand feet high in the mountains of British Columbia, Canada, a mineral search group gathered bags of tree seeds. Boxes were filled with smallbranches from the trees. Roots were dug and put into boxes. Each bag and box was carefullymarked. In a scientific laboratory, the parts of the forest trees were burned to ashes and tested.Each small part was examined to learn whether there were minerals in it.
Study of the roots, branches, and seeds showed no silver. But there were small amounts ofgold in the roots and a little less gold in the branches and seeds. The seeds growing nearest to thetree trunks had more gold than those growing on the ends of the branches.
26. Scientists were flying over a desert or a hilly wasteland or .a mountain area in order tosearch forin the ground.
A. gold
B. silver
C. uraniumD. minerals
27. The study of trees, branches and roots shows that
A. there were larger amounts of gold in the branches than in the seeds
B. there were smaller amounts of gold in the roots than in the branches
C. there were less amounts of gold in the seeds growing on the ends of branches than seeds growing nearest to the tree trunks
D. there was more gold in the branches than in the roots
28. Which is the best title suggested below?
A. Scientists Searching for Metals with Special Power
B. New Methods of Searching for Minerals
C. Gold Could Be Found by Trees and Plants
D. A New Method of Searching for Minerals--Using Trees and Plants
29. Which of the following is NOT mentioned as part of a tree that can help find minerals?
A. Leaves.
B. Roots.
C. Branches.
D. Seeds.
30. The scientists were searching for minerals by using
A. X-ray
B. magic power
C. a special instrument
D. trained eyes
Text l
参考译文
坐着飞机飞过一片沙漠之地，两位科学家用训练有素的眼睛察看下面的树木和灌木丛。经过大致一小时的飞行观察后，其中一位科学家在他的本子上写下这样一句话“看这里可能有金属矿藏。”另一架飞机上的科学家们正飞过一座山区。他们给地面观察站的科学家们发了“可能有金矿”的信息。步行越过山地，四名科学家得出报告：“应该在此地寻找金属矿藏”。从飞过多山丘的荒原的飞机上，一位科学家用无线电发回一个字：“铀”。
没有一个科学家具有x射线那样的眼睛：他们并没有看透地球表面的魔力。他们仅仅使用了一个最新的技术来定位地下的矿藏…树木和植被长在地上，通过他们能显示出某种埋藏在地下的矿物。
这项最新的寻找矿藏的技术是依据这样一个事实，即处在地下的矿物会影响到地面上灌木和树木的生长。
沃森巴溪是加拿大英属哥伦比亚一座6，000英尺的山上的一条小溪。一队矿藏搜索小组收集了许多包树木的种子;盒子里盛满了小树枝。树根也被挖掉放进盒子里。每个包和盒子都被仔细标记了。在科学实验室内，树枝被烧成灰然后做检测。检查每个细小的部分是否含有矿藏。
对树根、树枝和种子的检测并没发现银元素，但却在树根部发现了部分金元素，同时在树枝和种子中也发现了较少的金元素。长在最接近树干上的种子要比长在树枝根部的种子含金元素多一些。
答案及解析
26.D【解析】语义理解题。根据文章第一段的内容提到各种金属，而这些金属元素是包含在矿(mineral)里的。故本题选择D。
27.c【解析】细节题。从文中最后一句“The seeds growing nearest to the tree trunks had more gold than those growing on the ends of the branches.”(长在最接近树干上的种子比长在树枝根部的种子要含有更多的金元素)可知答案。故本题选择c。
28.D【解析】主旨题。通读全文可知文章的大部分(第二至五段)都在讲述通过植物来寻找矿藏。故本题选择D。
29.A【解析】细节题。从最后一段可知，通过研究roots，branches和 seeds可判定地下是否有矿产，而leaves在文章中却没有提到。故本题选择A。
30.D【解析】细节题。从文章第一段的第一句“two scientists looked down with trained eyes at trees and bushes”(两位科学家用受过训练的眼睛观察树木和灌木)可知答案。故本题选择D。
Text 2
The most frightening words in the English language are, "Our computer is down. " You hear it more and more when you are on business. The other day I was at the airport waiting for a ticket to Washington and the girl in the ticket office said, "I' m sorry, I can' t sell you a ticket. Our computer is down. "
"If your computer is down, just write me out a ticket. "
"I can' t write you out a ticket. The computer is the only one allowed to do so. "
I looked down on the computer and every passenger .was just standing there drinking coffee and staring at the black screen. Then I asked her, "What do all you people do?"
"We give the computer the information about your trip, and then it tells us whether you can fly with us or not. "
"So when it goes down, you go down with it. "
"That' s good, sir. "
"How long will the computer be down?" I wanted to know.
"I have no idea. Sometimes it' s down for 10 minutes, sometimes for two hours. There' s no way we can find out without asking the computer, and since it' s down it won' t answer us. "
After the girl told me they had no backup computer, I said. "Let' s forget the computer. What about your planes? They' re still flying, aren't they?"
"I couldn't tell without asking the computer. "
"Maybe I could just go to the gate and ask the pilot if he' s flying to Washington," I suggested.
"I wouldn't know what gate to send you to. Even if the pilot was going to Washington, he couldn't take you if you didn't have a ticket. "
"Is there any other airline flying to Washington within the next few hours?"
"I wouldn't know," she said, pointing at the dark screen. "Only ' IT' knows. It can' t tell me. "
By this time there were quite a few people standing in lines. The word soon spread to other travelers that the computer was down. Some people went white; some people started to cry and still others kicked their luggage.
31. The best title for the article is
A. When the Computer Is Down
B. The Most Frightening Words
C. The Computer of the Airport
D. Asking the Computer
32. What could the girl in the ticket office do for the passengers without asking the computer?
A. She could sell a ticket.
B. She could write out a ticket.
C. She could answer the passengers' questions.
D. She could do nothing.
33. why do you think they had not a backup computer?
A. Because it was easy down.
B. Because it was very expensive.
C. Because it was not advanced enough.
D. Because it was not as big as the main computer.
34. The last paragraph suggests that
A. a modern computer won' t be down
B. computers can take the place of humans
C. sometimes a computer may bring suffering to people
D. there will be great changes in computers
35. What did passengers do when the computer was down?
A. They left home and went home.
B. They drank coffee and stared at the black screen.
C. They began to talk to each other.
D. None above.
Text 2
参考译文
英语中最令人恐惧的句子是：“我们的电脑宕机了。”在出差的时候，这样的消息你听到的越来越多。前几天我在机场排队买去华盛顿的票。售票窗口的女孩说：“对不起，我们现在不能卖票。我们的电脑宕机了。”“要是电脑坏了，你就给我填一张票吧。”
“我无法给你填票。我们只能用电脑出票。”
我看着那台电脑。乘客们都站在那里，喝着咖啡，盯着那已黑了的`屏幕。然后我问她：“你们这些人都是干什么的?”
“我们把你旅途的信息输入电脑，然后它就会显示是否有合适你的航班。”
“所以要是电脑宕机了，你们就什么都不能干了。”
“是的。先生。”
“电脑宕机要持续多久?”我问道。
“我不清楚。有时十分钟，有时两个小时。要是不Pl电脑我们什么信息都不知道。既然现在它宕机了，它就不会回应我们了。”
从女孩那里得知没有备用电脑后，我说：“我们先别管电脑这事。你们的飞机呢?它们还在飞，是吗?”
“没有电脑，我就无法回答你。”
“或许我可以去大门那问飞行员是否要飞往华盛顿。”我暗示道。
“我不知道让你去哪个门找他。即使飞行员飞往华盛顿，要是没有机票.他也不会让你登机。”
“接下来的几个小时还有其他去华盛顿的航班吗?”
“我无法回答你，”她说着，顺便指指那黑了的屏幕，“只有‘它'知道.而它现在无法告诉我。”
现在已经没多少人排队了。电脑宕机的消息迅速传到了其他旅行者那里。一些人惊得脸都白了，有一些人开始大叫，还有一些人愤怒地踢他们的行李。
答案及解析
31.A【解析】主旨题。根据文章第一句中的“0ur computer is down”(我们的电脑宕机了)及后面的文章关于机场电脑宕机后的一些对话内容可知，文章主要讲述的是机场电脑宕机后发生的一些事情，故本题选择A。
32.D【解析】细节题。根据文章中的对话“When it[computer]goes down.you go down with it.”(若电脑宕机了，你们也工作不了 了。)可知，机场售票员什么都不能做。故本题选择D。
33.B【解析】主观题。没有备用电脑，最有可能是因为设备比较贵。故本题选择B。
34.C【解析】推断题。根据文章最后一段的描述：电脑死机，旅客们感到恐惧、忧郁、不安，故本题选择C。
35.B 【解析】细节题。文中第四段第一句“every passenger was just standing there drinking coffee and staring at the black screen.”(乘客们站在那儿，喝着咖啡，眼睛盯着那个黑掉了的屏幕)。
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