33.The plant needs to be every two days.or it will die. 查看更多

 

题目列表(包括答案和解析)

         Who hasn’t enjoyed eating peanuts? Did you know that although peanuts look like nuts and taste like nuts, they aren’t nuts at all? They belong to the pea family, so they are called peanuts. The peanut grows flowers above ground, but its “fruit” grows underground. It grows in more countries than most other “nuts”.
The peanut is a native South American plant. Scientists believe that it grew wild in Brazil long ago. They think that for several thousand years the early peoples of South America made it a part of their diet. These peoples were nomads who moved on when a natural food could no longer be found in one area. Along the way they probably let fall some peanuts, which got into the ground and grew. This is believed to be the way the plant reached the place where the Incas(印加人)lived. The Incas, from about 1100 to 1532, thought highly of peanuts. The peanuts were eaten in several forms and used as sacrificial offerings(祭品)to the Incan Sun God. Later in the 16th century, European soldiers had brought peanuts to other parts of the world, including North America, Africa, Asia, Europe, and Pacific Islands.
Although peanuts were found native in South America, they are now grown in almost every country that has warm weather. India produces the most peanuts. China’s production is next, followed by the United States.
The peanut is special in more ways than one. It can be eaten raw, boiled, roasted, or fried. Hundreds of widely different products have been made from it. Carver, an American scientist, set himself the task of discovering new uses for eating and for many other products.
Peanuts are very highly nutritious and are also high in protein (蛋白质). Americans use about seven-tenths of their protein in the form of meat. In India, where the poor can’t pay for meat or milk, peanut meal and peanut milk have been produced. These have been a great help to the poor.
New products are continually being made from peanuts, among them peanut cheese and a powder that becomes peanut butter when water is added. The fact is that peanuts are so healthy that they were used by astronauts. The unusual nut that isn’t a nut is one of nature’s most amazing gifts.
【小题1】 Although we like eating peanuts, many of us don’t know peanuts belong to _______ family.

A.the peaB.the nutC.both the pea and the nutD.neither the pea nor the nut
【小题2】 Which paragraph(段落)mainly talks about the history of the peanut?
A.Paragraph FourB.Paragraph Three
C.Paragraph TwoD.Paragraph One
【小题3】What does the underlined word nutritious mean?
A.Helpful for staying healthy.B.Helpful to the poor.
C.Delicious and tasty.D.Rich in fat and oil.
【小题4】 Which of the following is TRUE according to the article?
A.Nomads always stayed in the same place.
B.The peanut was first found in South America.
C.Astronauts ate lots of peanuts to keep healthy.
D.China grows fewer peanuts than the US.
【小题5】What is the purpose of the article?
A.To show that peanuts belong to the pea family.
B.To advise us to use more peanut products.
C.To tell us some new uses of peanuts.
D.To let us know more about peanuts.

查看答案和解析>>

根据短文内容完成任务
Can plants eat people? Probably not, but there are many plants that eat meat. Some of them are big, and they can eat small animals. One famous meat-eating plant is the Venus flytrap.
The Venus flytrap is a very strange plant. It grows in dry parts of the United States. Its leaves are like the pages of a book. (A) They can open and close very quickly. Inside the leaves, there are three small hairs. If an insect touches one of the hairs, the leaf closes quickly. The insect cannot get out. In about half an hour, the leaf presses(挤压) the insect until it is dead. Then, the plant covers the insect with a special liquid (液体). Slowly, the plant eats the insect.
(B) Plants are living things that have leaves and roots and grow in earth. Most of them get energy from the sun, the air, and the ground. In some places, the ground is very poor. It doesn’t have all the important things that plants need, especially nitrogen (氮). Animal meat has a lot of nitrogen, so some plants eat meat to get what they need. Let’s hope that some of the bigger plants don’t get the same idea!
【小题1】Can plants get energy from the air?
【小题2】Why is Venus flytrap a famous piant?
【小题3】In some places, why do some plants get energy from animal meat?
【小题4】写出(A)处划线单词they所指代的名词。
【小题5】将(B)处划线句子改为两个简单句。
Plants are living things.   ______________________________

查看答案和解析>>

Who hasn’t enjoyed eating peanuts? Did you know that although peanuts look like nuts and taste like nuts, they aren’t nuts at all? They belong to the pea family, so they are called peanuts. The peanut grows flowers above ground, but its “fruit” grows underground. It grows in more countries than most other “nuts”.
The peanut is a native South American plant. Scientists believe that it grew wild in Brazil long ago. They think that for several thousand years the early peoples of South America made it a part of their diet. These peoples were nomads who moved on when a natural food could no longer be found in one area. Along the way they probably let fall some peanuts, which got into the ground and grew. This is believed to be the way the plant reached the place where the Incas(印加人)lived. The Incas, from about 1100 to 1532, thought highly of peanuts. The peanuts were eaten in several forms and used as sacrificial offerings(祭品)to the Incan Sun God. Later in the 16th century, European soldiers had brought peanuts to other parts of the world, including North America, Africa, Asia, Europe, and Pacific Islands.
Although peanuts were found native in South America, they are now grown in almost every country that has warm weather. India produces the most peanuts. China’s production is next, followed by the United States.
The peanut is special in more ways than one. It can be eaten raw, boiled, roasted, or fried. Hundreds of widely different products have been made from it. Carver, an American scientist, set himself the task of discovering new uses for eating and for many other products.
Peanuts are very highly nutritious and are also high in protein (蛋白质). Americans use about seven-tenths of their protein in the form of meat. In India, where the poor can’t pay for meat or milk, peanut meal and peanut milk have been produced. These have been a great help to the poor.
New products are continually being made from peanuts, among them peanut cheese and a powder that becomes peanut butter when water is added. The fact is that peanuts are so healthy that they were used by astronauts. The unusual nut that isn’t a nut is one of nature’s most amazing gifts.
【小题1】 Although we like eating peanuts, many of us don’t know peanuts belong to _______ family.

A.the peaB.the nutC.both the pea and the nutD.neither the pea nor the nut
【小题2】 Which paragraph(段落)mainly talks about the history of the peanut?
A.Paragraph FourB.Paragraph Three
C.Paragraph TwoD.Paragraph One
【小题3】What does the underlined word nutritious mean?
A.Helpful for staying healthy.B.Helpful to the poor.
C.Delicious and tasty.D.Rich in fat and oil.
【小题4】 Which of the following is TRUE according to the article?
A.Nomads always stayed in the same place.
B.The peanut was first found in South America.
C.Astronauts ate lots of peanuts to keep healthy.
D.China grows fewer peanuts than the US.
【小题5】What is the purpose of the article?
A.To show that peanuts belong to the pea family.
B.To advise us to use more peanut products.
C.To tell us some new uses of peanuts.
D.To let us know more about peanuts.

查看答案和解析>>

You are probably familiar with the saying:An apple a day keeps the doctor away. A recent research carried out by the Chinese University of Hong Kong may change the saying:
An apple a day may keep aging away.
The research chose fruit flies(果蝇), as they share many genes(基因)with humans. The fruit flies were either fed normally or had an apple extract(浓缩物) added to their diet.
It turned out that those fruit flies that were given apple extract lived about 55 days—five days longer than the flies that were normally fed. The research group also found it easier for the flies to walk,climb and move about as they aged.
According to the result, the researchers believed that the antioxidants(抗氧化剂) in the apple extract helped clean up dangerous chemicals(化学物质) that cause illnesses,as well as aging.
In another study,researchers examined diets of thousands of women. They discovered that those who regularly ate apples were 20 percent less likely to suffer heart illnesses and stroke.
The apples’ genetic code(遗传密码) was discovered recently. It allows scientists to develop nicer and healthier fruits. Researchers are already using the information to grow a kind of apples full of antioxidants that can keep eyes and joints healthy and protect humans against heart illnesses and cancer.
Apples that kill the desire(欲望) to eat could also be produced, with the first“extra-healthy’’apples on supermarket shelves within just four or five years.
The team that keeps studying apple DNA includes 100 scientists from five countries. Their research also suggests that around 65 million years ago, when dinosaurs began to die off the plant,which would finally become today’s apple tree, experienced a great genetic change. The number of many of its genes doubled. The extra genes allowed the apple to get used to worse conditions and go through a different development from peaches,strawberries and other related fruits.
【小题1】Why were fruit flies used for the research?
A.Because they have a similar diet to humans.
B.Because they have a history as long as apples.
C.Because they share a lot of genes with humans.
D.Because they feed on nothing but apple extract.
【小题2】What result did the researchers find out?
A.Apples produce chemicals that can change human genes.
B.Apples have antioxidants that kill chemicals that cause aging.
C.Apples are rich in vitamins that are needed in humans’bodies.
D.Apples produce chemicals that make apples taste more delicious.
【小题3】What happened to apples around 65 million years ago according to the research?
A.Their genes stopped their development as the environment got worse.
B.Their genes became twice in number but they finally died off like dinosaurs.
C.They experienced a great genetic change making them used to worse conditions.
D.They went through a similar development to peaches, strawberries and other related fruits.
【小题4】What can we infer(推断)from the passage?
A.Eating apples may bring us more advantages than we might believe before.
B.People who have the habit of eating apples don’t need to see a doctor.
C.Apples that kill the desire to eat are already available in supermarkets now.
D.People will eat apples instead of peaches and strawberries from now on.

查看答案和解析>>

根据短文内容完成任务
Can plants eat people? Probably not, but there are many plants that eat meat. Some of them are big, and they can eat small animals. One famous meat-eating plant is the Venus flytrap.
The Venus flytrap is a very strange plant. It grows in dry parts of the United States. Its leaves are like the pages of a book. (A) They can open and close very quickly. Inside the leaves, there are three small hairs. If an insect touches one of the hairs, the leaf closes quickly. The insect cannot get out. In about half an hour, the leaf presses(挤压) the insect until it is dead. Then, the plant covers the insect with a special liquid (液体). Slowly, the plant eats the insect.
(B) Plants are living things that have leaves and roots and grow in earth. Most of them get energy from the sun, the air, and the ground. In some places, the ground is very poor. It doesn’t have all the important things that plants need, especially nitrogen (氮). Animal meat has a lot of nitrogen, so some plants eat meat to get what they need. Let’s hope that some of the bigger plants don’t get the same idea!
【小题1】Can plants get energy from the air?
【小题2】Why is Venus flytrap a famous piant?
【小题3】In some places, why do some plants get energy from animal meat?
【小题4】写出(A)处划线单词they所指代的名词。
【小题5】将(B)处划线句子改为两个简单句。
Plants are living things.   ______________________________

查看答案和解析>>


同步练习册答案