NASA is moving ahead with plans to put a long-armed Lander on Mars’ icy North Pole to search for clues for water and possible signs of life.

The $386 million Phoenix Mars is planned to touch down in the Martian arctic in 2008. The stationary probe will use its robotic arm to dig into the icy land and pick up soil samples to analyze. In 2002, the Mars Odyssey orbiter spotted evidence of ice-rich soil near the arctic surface.

Scientists hope the Phoenix mission will find clues to the geologic history of water on the Red Planet and determine whether microbes existed in the ice.

Phoenix will be the first mission of the Mars Scout program, a renewed, low-cost effort to study the Red Planet. “The Phoenix mission explores new territory in the northern plains of Mars analogous to the permafrost regions on Earth,” Peter Smith said.

True to its name, Phoenix rose from the ashes of previous missions. The lander for Phoenix was built to fly as part of the 2001 Mars Surveyor program. But the program broke down after the well-known disappearance of the Mars Polar Lander in 1999. The Polar Lander lost contact during a landing attempt near the planet’s south pole after its rocket engine shut off prematurely, causing the spacecraft to fall about 130 feet to almost certain destruction.

The Phoenix probe had been in storage at a Lockheed Martin clean room in Denver before it was reused for its present mission. It will carry science instruments that were designed for the Mars Surveyor program including an improved panoramic camera and a trench-digging robotic arm. Phoenix will lift off from the Kennedy Space Center in August 2007 and land on the planet nine months later.

 

46. The passage mainly tells readers that _________.

A. clues of water will be found in Phoenix 

B. Phoenix will be sent to find clues of water on Mars

C. August 2007 will see Phoenix lift off   

D. the Mars Scout program will be carried out

47. The underlined word “prematurely” （paragraph 5） means _________.

A. on time     B. behind the time      C. out of work       D. ahead of time

48. According to the passage, we know Phoenix will land on Mars _________.

A. in May 2008                       B. in August 2007

C. in August 2008                    D. in September 2008

49. According to the passage, the name “Phoenix” is after the meaning of _________.

A. rebirth          B. death          C. energy         D. hope

50. After Phoenix lands on Mars, we can infer it will firstly _________.

A. find soil samples and send them to the earth  B. look for the icy land to dig for the soil samples

C. take photos and send them to the earth          D. find the remains of the Mars Polar Lander

本文主要是講美國國家航空和航天管理局計(jì)劃2008年將Phoenix送到火星探索水源的線索和存在生命的可能性。

46. B 主旨大意題。由第一段可知。

47. D 猜測詞義題。由該詞所處語境和常識(shí)可知，是火箭引擎“提前”關(guān)閉，才會(huì)失去聯(lián)系。

48. A 細(xì)節(jié)理解題。由最后一段的最后一句可推算出。

49. A 推理判斷題。由第五段第一句推知。

50. B 推理判斷題。由第二段第二句可知。

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語 來源： 題型：

寫作背景：今年4月，墨西哥爆發(fā)了H1N1流感，疾病迅速蔓延全球多個(gè)國家。假設(shè)你是一名新聞?dòng)浾�，�?qǐng)根據(jù)以下信息寫一篇100字的新聞報(bào)道。

【寫作內(nèi)容】

1. 世界各國互相合作，正盡力控制病毒的擴(kuò)散。

2. 專家估計(jì)該疾病的死亡率低于1%，低于SARS和禽流感。

3. 主要癥狀：發(fā)燒、咳嗽、打噴嚏，可以在人與人之間傳播

4. 預(yù)防方法：勤洗手、多喝水、充足睡眠

   【寫作要求】只能使用5個(gè)句子表達(dá)全部內(nèi)容。

   【評(píng)分標(biāo)準(zhǔn)】句子結(jié)構(gòu)準(zhǔn)確，信息內(nèi)容完整，篇章結(jié)構(gòu)連貫。

    參考詞匯：禽流感 bird flu   H1N1流感: H1N1 flu

查看答案和解析>>

科目：高中英語 來源： 題型：閱讀理解

This year is the two hundredth anniversary of the birth of writer Edgar Allan Poe．Edgar Allan Poe，whose life was    21    and seemingly unhappy，wrote stories and poems of mystery and     22   ，insanity （瘋狂） and death．Edgar went to live with the family of a wealthy Richmond businessman named John Allan after both his parents died．John Allan never officially    23    him as a son，but the boy became known as Edgar Allan Poe．

Edgar A1lan Poe did something    24    for writers of his time：he used a narrator in a story to    25    what was happening．Edgar Allan Poe is also remembered as the father of modern    26    fiction，stories of an investigator who has to solve murders and other     27   ．Arthur Conan Doyle，creator of the fictional detective Sherlock Holmes, wrote about how Poe    28    other crime writers：”Their main art must trace back to those admirable stories of Monsieur Dupin”．Dupin is a     29     that appears in a series of Allan Poe’s detective stories．

Allan Poe was born in 1 809 and died in 1 849．Every year on January nineteenth，Poe’s birthday，a man dressed in black    30  ．His face is covered．He places a bottle of wine and three roses on Poe’s grave．No one really wants to know the visitor’s identity．They prefer that it remain a mystery，much like Edgar Allan Poe himself．

 

21．A．short

B．long

C．boring

D．simple

22．A．happiness

B．science

C．society

D．terror

23．A．a(chǎn)dopted

B．a(chǎn)dapted

C．treated

D．considered

24．A．ordinary

B．horrible

C．favorite

D．unusual

25．A．play

B．sing

C．describe

D．recite

26．A．horror

B．detective

C．love

D．a(chǎn)dventure

27．A．a(chǎn)ccidents

B．crimes

C．events

D．incidents

28．A．commented

B．influenced

C．judged

D．criticized

29．A．writer

B．poet

C．character

D．a(chǎn)ctor

30．A．speaks

B．performs

C．a(chǎn)ppears

D．dies

查看答案和解析>>

科目：高中英語 來源： 題型：

假設(shè)你是你校校園廣播站的記者，請(qǐng)根據(jù)以下內(nèi)容給廣播站寫一篇英語新聞報(bào)道。

[寫作內(nèi)容]

活動(dòng)目的

為了慶祝改革開放30年所取得的偉大成就

活動(dòng)形式

演講比賽

活動(dòng)組織

高二年級(jí)

觀摩人員

本校高二年級(jí)全體師生、部分學(xué)生家長和學(xué)校領(lǐng)導(dǎo)，共1200多人

活動(dòng)地點(diǎn)

學(xué)校體育館

活動(dòng)時(shí)間

2009年3月15日下午

參賽選手

來自高二年級(jí)不同班級(jí)的18名選手非常流利地做了精彩的演講。有的從親身經(jīng)歷講述祖國發(fā)生的巨大變化；有的通過家鄉(xiāng)今昔的對(duì)比來贊美改革開放的英明決策。

活動(dòng)影響

活動(dòng)使我們更自信，更為祖國感到自豪，決心努力學(xué)習(xí)，把國家建設(shè)的更加美麗。

參考詞匯：改革開放 reform and opening up

[寫作要求]

1.     只能使用5個(gè)句子表達(dá)全部對(duì)所給要點(diǎn);

2.     報(bào)道中不得提及考生所在學(xué)校及本人姓名。

[評(píng)分標(biāo)準(zhǔn)]

句子結(jié)構(gòu)準(zhǔn)確，信息內(nèi)容完整，篇章結(jié)構(gòu)連貫。

查看答案和解析>>

科目：高中英語 來源： 題型：閱讀理解

Climatic conditions are delicately adjusted to composition of the Earth's atmosphere. If there were a change in the atmosphere ― for example, in the relative amounts of atmospheric gases ― the climate would probably change also. A slight increase in water vapor (蒸汽) , for example, would increase the heat-keeping capacity of the atmosphere and would lead to a rise in global temperatures.

The level of carbon dioxide, CO2, in the atmosphere has an important effect on climatic change. Most of the Earth's incoming energy is short-wavelength radiation (短波輻射) , which tends to pass through atmospheric CO2 easily. The Earth, however, reradiates much of the received energy as long-wavelength radiation (長波輻射), which CO2 absorbs and then goes toward the Earth. This phenomenon, known as the greenhouse effect, can result in an increase in the surface temperature of a planet. An extreme example of the effect is shown by Venus, a planet covered by heavy clouds composed mostly of CO2, whose surface temperatures have been measured at 430~C.If the CO2 content of the atmosphere is reduced, the temperature falls. According to one respectable theory, if the atmospheric CO2 concentration were halved, the Earth would become completely covered with ice.  Another equally respectable theory, however, states that a halving of the CO2 concentration would lead only to a reduction in global temperatures of 3℃.

If, because of an increase in forest fires or volcanic activity, the CO2 content of the atmosphere increased, a warmer climate would be produced. Plant growth, which relied on both the warmth and the availability of CO2, would probably increase. As a consequence, plant would use more and more CO2.  Eventually CO2 levels would decrease and the climate, in turn, would become cooler. With reduced temperatures many plants would die; CO2 would thus be returned to the atmosphere and gradually the temperature would rise again. Thus, if this process occurred, there might be a long-term oscillation (波動(dòng)) in the amount of CO2 present in the atmosphere, with regular temperature increase and decrease.

Some climatologists argue that the burning of fossil fuels has raised the level of CO2 in the atmosphere and has caused a global temperature increase of at least 1℃. But a supposed global temperature rise of 1 ℃ may in reality be only several regional temperature increases, restricted to areas where there are many meteorological (氣象的) stations. Other areas, for example, the Southern Hemisphere oceanic zone, may be experiencing an equal temperature decrease that is unrecognized because of the shortage of meteorological recording stations.

 

51. Which of the following questions does the information supplied in this passage try to answer?

A. What are the steps in the process that takes place as CO2 absorbs long-wavelength radiation?

B. How might our understanding of the greenhouse effect be improved if the burning of fossil  were decreased?

C. What might cause a series of regular increases and decreases in the amount of CO2 in the atmosphere?

D. Why are there fewer meteorological recording stations in the Southern Hemisphere oceanic zone than atmosphere?

52. The author is primarily concerned with ________.

A. explaining the effects that the burning of fossil fuels might have on climate

B. explaining the effects of CO2 on atmospheric radiation

C. discussing effects that changes in the CO2 level in the atmosphere might have on climate

D. challenging hypotheses (假說)  about the effects of water vapor and CO2 on climate

53. The passage suggests that a large decrease in the amount of CO2 in the atmosphere would result in _________.

A. at least a slight decrease in global temperatures

B. at the most a slight increase in short-wavelength radiation reaching the Earth

C. a slight long-term increase in global temperatures

D. a slight short-term increase in atmosphere water vapor content

54. The author refers to Venus primarily in order to _______.

A. show that the greenhouse effect works on other planets but not on Earth

B. show the degree to which Earth's atmosphere differs from that of Venus

C. support the opinion that as water vapor increases, the amount of CO2 increases

D. support the argument that the CO2 level in the atmosphere has a significant effect on climate

55. The discussion of climate in the passage suggests that _________.

A. climate is perfectly stable

B. we are unable at present to measure global temperature changes precisely.

C. the only cause of regional climatic fluctuations (波動(dòng)) is the change in CO2 1evel in the atmosphere

D. slight regional temperature changes can be considered an abnormal feature (特征) of the environment

查看答案和解析>>

科目：高中英語 來源： 題型：

Please tell me how the accident        ? I am still in the dark.

       A．came by              B．came upon           C．came to               D．came about

查看答案和解析>>

科目：高中英語 來源： 題型：

In his address at the end of the summit, Mr. Bush said       the financial crisis facing the United States and many other countries was a severe one.

       A．it is no wonder that                              B．there was no doubt that

       C．it has no wonder if                               D．there is no doubt whether

查看答案和解析>>

科目：高中英語 來源： 題型：

It was strange that you         for Maggie’s address．I just got a letter from her ---the first one since her family moved to New Jersey．

      A．should have asked                               B．should ask

      C．could ask                                           D．would have asked

查看答案和解析>>

科目：高中英語 來源： 題型：閱讀理解

根據(jù)短文內(nèi)容，從短文后的選項(xiàng)中選出能填入空白處的最佳選項(xiàng)。選項(xiàng)中有兩項(xiàng)為多余選項(xiàng)。

We are all called upon to make a speech at some point in life, but most of us don’t do a very good job.     71     .

So, you have to give a speech―and you are terrified. You get nervous, you forget what you want to say, you stumble（結(jié)結(jié)巴巴） over words, you talk too long, and you bore your audience. Later you think, “Thank Goodness, it’s over. I’m just not good at public speaking. I hope I never have to do that again.”

Cheep up!     72     . Here are some simple steps to take the pain out of speech making. Ask yourself the purpose of your speech. What is the occasion? Why are you speaking? Then, gather as many facts as you can on your subject. Spend plenty of your time doing your research. Then spend plenty of your time organizing your material so that your speech is clear and easy to follow. Use as many examples as possible, and use pictures, charts, and graphs if they help you make your points more clearly.      73      . Don’t talk over their heads, and don’t talk down to them. Treat your audience with respect. They will appreciate your thoughtfulness.

Just remember: Be prepared. Know your subject, your audience, and the occasion. Be brief.      74     . And be yourself. Let your personality come through so that you make person-to-person contact with your audience.

If you follow these simple steps, you will see that you don’t have to be afraid of public speaking. In fact, you may find the experience so enjoyable that you volunteer to make more speeches! You’re not convinced yet?       75     .

A. It doesn’t have to be that bad.

B. Take several deep breaths before your speech.

C. This article gives some advice on how to give a good speech.

D. Say what you have to say and then stop.

E. Don’t say what you aren’t familiar with.

F. Never forget your audience.

G. Give it a try and see what happens.

查看答案和解析>>

同步練習(xí)冊(cè)答案