年級(jí) | 高中課程 | 年級(jí) | 初中課程 |
高一 | 高一免費(fèi)課程推薦! | 初一 | 初一免費(fèi)課程推薦! |
高二 | 高二免費(fèi)課程推薦! | 初二 | 初二免費(fèi)課程推薦! |
高三 | 高三免費(fèi)課程推薦! | 初三 | 初三免費(fèi)課程推薦! |
科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解
All plant cells are able to take up water. Even dead ones do to a certain degree. Absorption of water by dead cell walls makes wood swell(腫脹). In common land plants, the living cells of roots take up most of the water. Land plants without roots do exist, however. Those greenish-yellow lichens(苔蘚)you see on tree trunks and on rocks in the high mountains have no roots. Half a billion years ago, when water plant started to invade the land, the first primitive land plants did not have roots; they were marsh (沼澤) plants.
Even among the flowering plants, one finds rootless forms. These flowering plants are the so-called higher plants because they evolved more recently and are thus considered higher on the evolutionary scale. In the Peruvian desert, there grows one of these rootless higher plants, a bromeliad. It is a relative of the pineapple. Even if this plant had roots, they would be of no use, because where the plant grows, it never rains. The plant gets its water exclusively from the dew it collects at night, when its leaves cool off. Such rootless plants, of course, can be moved with ease, but they will only grow when they are placed out in the open. If they are placed too near a house, the radiation from the heat of the house prevents the leaves from cooling and so prevents dew from forming, and the plant dies. In the southern United States and in Puerto Rico, one sees bromeliads growing high above the streets on the insulation of electric wires. These plants get their water from rain, and the only soil they ever come in contact with is the dust that may blow on their leaves.
Wood swells because of _______.
A. the dead cell walls B. tiny drops of water entering the dead cell
C. the growth of the cell D. the death of the cell
From the passage we know that the evolutionary scale is arranged according to ______.
A. evolutionary cycles B. heights and depths
C. time D. kinds
The bromeliad is a plant that _______.
A. has useless roots B. is a pineapple
C. can grow anywhere D. takes up water through its leaves
Which of the following is NOT true?
Water plants existed before land plants.
Only living plant cells take up water.
The greenish-yellow lichens are uncommon land plants.
The living cells of roots absorb more water than the rest of the plant.
The most suitable title for this passage is ______.
A. water intake by cells B. rootless plantsC. plant in the desert D. higher plants
查看答案和解析>>
科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解
◆200 dead as Brazilian plane crashes in Sao Paulo
Up to 200 people were dead after a passenger plane with 176 people aboard slid off the runway on landing and hit a fuel storage tank at Sao Paulo's Congonhas airport on Tuesday.
Brazilian airline TAM said that 170 passengers and 6 crew were aboard the Airbus A320 flying from Porto Alegre in southern Brazil to Sao Paulo when it lost control on landing and slid off the wet runway.
Brazilian news agency Folha reported up to 200 people were dead, including some victims on the ground.
◆_______________________________________
Two people were killed Saturday in two separate plane crashes in the United States, media reports said.
In Dayton, Ohio, a plane crashed on a runway of the Dayton International Airport while performing during the Vectren Dayton Air Show. The pilot, Jim LeRoy, was taken to Miami Valley Hospital and was announced dead. The air show was canceled .
Also on the same day, two single-engine war planes at an experimental air show collided(相撞) in Wisconsin while landing, killing one of the pilots and injuring the other.
◆All 114 aboard Kenya plane killed
A Kenya Airways plane that crashed after takeoff in Cameroon with 114 people on board is largely submerged (淹沒(méi)) in a swamp(沼澤地) and there is no chance of survivors, Cameroon 's civil protection service said on Monday
The Boeing 737-800 had taken off from Douala and its wreckag (殘骸)was found just 12 miles from the town. The plane fell head first. But the cause of the crash remained unclear.
Among the passengers were Associated Press reporter Anthony Mitchella and an executive from the South African cell phone giant MTN. Five Chinese passengers were also killed in the crash .
The Brazilian plane crash caused extra deaths mainly because______
A .it skidded off the wet runway. B. the runway. was very short
C. it hit a fuel storage tank D. its pilot was inexperienced
The proper title for News 2 would be _________.
A. Two pilots killed in plane crashes in US B. The tragedies of the air show
C. Who is to blame for the plane crashes? D. Big losses can result from small things
Which of the following statements is NOT TRUE as for the Kenya plane crash?
A. The plane crashed after the plane took off.
B. The cause of the crash was under examination
C. 114 passengers on board were killed including an African
D. The place where the plane crashed led to many more deaths
The Brazilian plane crash killed about _____people in all on the ground.
A. 170 B. 30 C. 24 D. 6
It can be inferred from the three news that_________
A. when the Airbus A320 landed, it was likely to be raining heavily
B. during the Vectren Dayton Air Show , the pilot, Jim LeRoy died on the scene
C. The place where the Boeing 737-800 crashed was just 12 miles from the town
D. Five Chinese passengers were victims of the Kenya plane crash
查看答案和解析>>
科目:高中英語(yǔ) 來(lái)源:甘肅省2010屆高三下學(xué)期第二次診斷測(cè)試英語(yǔ)試卷 題型:閱讀理解
C
What is blood? It is the red liquid which comes out of your finger when you cut it. There are bout thirteen pints(品脫) of blood in a man' s body. He can give a pint of blood at a time to
blood bank for the use of other men who may need it. A healthy body makes up one pint of bloo
quickly.
What does our blood do for us? It takes food to all parts of our bodies and takes waste awa
from them. All the parts of our bodies are made up of cells, and these cells, which are very small
all need food all the time.
The blood is like a stream. The cells take what they need out of the blood stream, as plants an fishes take their food out of water. The blood stream carries food and oxygen which it has taken up our lungs to all the cells in the body.
What makes the blood go on moving round the body in a stream? The heart sends it round.
man' s heart is about the Size of his fist. The heart is a pump. It has rooms in it with doors betwee
them. It pumps blood in and out through these doors by changing the size of the rooms so that th
doors open and shut.
The heart keeps stream of blood going all round the body and back again to itself. Everywhel the blood stream does two things: supplies the cells with food and oxygen and takes away the waste It is as if the blood kept the little fires in the cells burning and took away the ashes.
49. Blood is the_____
A. red liquid which comes from your finger B. red liquid which we can see
C. red liquid which flows in a man's body D. red cell
50. The blood in a man' s body__________.
A. makes food all the time
B. takes food to all cells in the body and takes waste away
C. supplies the cells with food and oxygen from them
D. takes waste away from the cells
51. __ makes the blood go on moving round the body in a stream.
A. The heart B. The lung C. The cell D. The pump
52. This article tells us about__________.
A. a stream of blood B. the use of the heart
C. a wonderful pump D. something about blood
查看答案和解析>>
科目:高中英語(yǔ) 來(lái)源:甘肅省2010屆高三下學(xué)期第二次診斷測(cè)試英語(yǔ)試卷 題型:閱讀理解
C
What is blood? It is the red liquid which comes out of your finger when you cut it. There are bout thirteen pints(???) of blood in a man' s body. He can give a pint of blood at a time to
blood bank for the use of other men who may need it. A healthy body makes up one pint of bloo
quickly.
What does our blood do for us? It takes food to all parts of our bodies and takes waste awa
from them. All the parts of our bodies are made up of cells, and these cells, which are very small
all need food all the time.
The blood is like a stream. The cells take what they need out of the blood stream, as plants an fishes take their food out of water. The blood stream carries food and oxygen which it has taken up our lungs to all the cells in the body.
What makes the blood go on moving round the body in a stream? The heart sends it round.
man' s heart is about the Size of his fist. The heart is a pump. It has rooms in it with doors betwee
them. It pumps blood in and out through these doors by changing the size of the rooms so that th
doors open and shut.
The heart keeps stream of blood going all round the body and back again to itself. Everywhel the blood stream does two things: supplies the cells with food and oxygen and takes away the waste It is as if the blood kept the little fires in the cells burning and took away the ashes.
49. Blood is the_____
A. red liquid which comes from your finger B. red liquid which we can see
C. red liquid which flows in a man's body D. red cell
50. The blood in a man' s body__________.
A. makes food all the time
B. takes food to all cells in the body and takes waste away
C. supplies the cells with food and oxygen from them
D. takes waste away from the cells
51. __ makes the blood go on moving round the body in a stream.
A. The heart B. The lung C. The cell D. The pump
52. This article tells us about__________.
A. a stream of blood B. the use of the heart
C. a wonderful pump D. something about blood
查看答案和解析>>
科目:高中英語(yǔ) 來(lái)源: 題型:閱讀理解
C
What is blood? It is the red liquid which comes out of your finger when you cut it. There are bout thirteen pints(品脫) of blood in a man' s body. He can give a pint of blood at a time to
blood bank for the use of other men who may need it. A healthy body makes up one pint of bloo
quickly.
What does our blood do for us? It takes food to all parts of our bodies and takes waste awa
from them. All the parts of our bodies are made up of cells, and these cells, which are very small
all need food all the time.
The blood is like a stream. The cells take what they need out of the blood stream, as plants an fishes take their food out of water. The blood stream carries food and oxygen which it has taken up our lungs to all the cells in the body.
What makes the blood go on moving round the body in a stream? The heart sends it round.
man' s heart is about the Size of his fist. The heart is a pump. It has rooms in it with doors betwee
them. It pumps blood in and out through these doors by changing the size of the rooms so that th
doors open and shut.
The heart keeps stream of blood going all round the body and back again to itself. Everywhel the blood stream does two things: supplies the cells with food and oxygen and takes away the waste It is as if the blood kept the little fires in the cells burning and took away the ashes.
49. Blood is the_____
A. red liquid which comes from your finger B. red liquid which we can see
C. red liquid which flows in a man's body D. red cell
50. The blood in a man' s body__________.
A. makes food all the time
B. takes food to all cells in the body and takes waste away
C. supplies the cells with food and oxygen from them
D. takes waste away from the cells
51. __ makes the blood go on moving round the body in a stream.
A. The heart B. The lung C. The cell D. The pump
52. This article tells us about__________.
A. a stream of blood B. the use of the heart
C. a wonderful pump D. something about blood
查看答案和解析>>
百度致信 - 練習(xí)冊(cè)列表 - 試題列表
湖北省互聯(lián)網(wǎng)違法和不良信息舉報(bào)平臺(tái) | 網(wǎng)上有害信息舉報(bào)專(zhuān)區(qū) | 電信詐騙舉報(bào)專(zhuān)區(qū) | 涉歷史虛無(wú)主義有害信息舉報(bào)專(zhuān)區(qū) | 涉企侵權(quán)舉報(bào)專(zhuān)區(qū)
違法和不良信息舉報(bào)電話(huà):027-86699610 舉報(bào)郵箱:58377363@163.com