科目:初中英語 來源:2013屆北京市延慶縣九年級上學期期末考試英語試卷(帶解析) 題型:閱讀理解
It is easy for us to tell who our family members are, but do plants recognize(識別) their own family? Some do, scientists say, according to a report by Science News in early 2010.
Guillermo P. Murphy and Susan Dudley are two plant scientists from McMaster University in Hamilton, Canada. They did a few experiments with Jewelweeds, a kind of flower that grows in wet, shady spots. They found that the flowers seem to know their own flower family. In their experiments, Murphy and Dudley planted jewelweeds in pots with either siblings or strangers.
When jewelweeds were planted in pots with strangers, the plants started to grow more leaves than if they had been planted alone. This response(反應)suggests that plants are competing with strangers for sunlight, since a plant with more leaves can receive more light and make more food. Jewelweeds usually grow in the shade, where sunlight is not enough.
When jewelweed seedlings(幼苗)were planted with siblings, they grew a few more branches than they usually would if they were alone – but they did not start growing lots of extra leaves. This behavior suggests the plants are more likely to share resources, rather than compete.
According to the Science News report, Jewelweeds are not the first plants that plant scientists have studied for family recognition. In 2007, Dudley and her team studied the Great Lakes sea rocket, a plant that grows on the beach – where it may be hard to get fresh water. In that experiment, the scientists found that when sea rockets were planted with siblings, they tolerated each other. But when they were planted with strangers, the sea rockets reacted by working extra hard to grow lots of roots.
Dudley says this just because sea rockets, on the beach, get plenty of sun but struggle for water – so when they’re threatened, they compete for water. Jewelweeds have plenty of water but have to compete for sunshine, so they grow more leaves.
【小題1】 What does the underlined word siblings mean?
A.Flowers come from foreign countries. |
B.Plants growing in different environments. |
C.Flowers planted with lots of strangers. |
D.Plants that are the same kind. |
A.make a comparison | B.introduce a topic |
C.describe a pretty flower | D.build a new theory |
A.grow more leaves than those planted in groups |
B.become taller than those with more branches |
C.grow fewer leaves than those planted with strangers |
D.become ill easily because they can’t get enough shade |
A.New Discoveries about Plants |
B.How Plants Compete with Each Other |
C.Family Recognition among Plants |
D.Jewelweeds and the Great Lakes Sea Rockets |
查看答案和解析>>
科目:初中英語 來源:2012-2013學年江蘇省啟東市東海中學八年級上學期期中考試英語試卷(帶解析) 題型:單詞拼寫
首字母填空
Once there was a poor old woman. She lives by herself in a little house in a village. She didn,t have m 【小題1】 money but she was very kind.
One day a young man named Bill came to her d 【小題2】 .He was very thin. He was very hungry and a 【小題3】 the old woman for help. The old woman said,“Come in and have dinner with me,but my dinner is only some potatoes.”They had d 【小題4】 together. After dinner,the old woman told Bill to t【小題5】 some potatoes with him. He thanked her and left.
Ten years later,Bill came b 【小題6】to the old woman,s door again and gave her a bag of m 【小題7】 .She was surprised. Bill said,“Ten years ago you gave me some p 【小題8】.I grew some potato plants. From those plants,I grew some more plants. Now I,m a r 【小題9】 farmer. But I never forget how k 【小題10】 you were to me.”
查看答案和解析>>
科目:初中英語 來源:2013-2014學年浙江省寧波市中考第一次模擬英語試卷(解析版) 題型:完型填空
根據(jù)短文內(nèi)容,從各題所給的A、B、C、D四個選項中選出最佳選項。
“Never give up!” It is my law(法則) of life. It has brought me ____. I learned the law from my father's ____ story.
My father was ____ in a poor village in the north of Jiangsu,in China. When he was a young boy,he went to school in the morning,then ___ in the fields till sunset. And then he did his homework ____ midnight. Life was hard,because they had no ___!
At the age of 14,my father heard of the United States of America. It was the land of gold,the land where ____ people can become rich.
“____ don't I go to America?” he thought to himself,full of hope.
So,my father came to America. “I had thought it was easy to ____ money in America,” he told me. “But when I arrived there,I realized it was not true. They did not like to hire(雇傭) me because I spoke ____ English. Later,I worked in a small restaurant,cleaning up tables,____dishes and sweeping the floor. Life was ____ for the first few years. I worked from 10 a. m. to 11 p. m. I wanted to go to school to learn English,but it was impossible. I couldn't ____ the schooling(學費). ”
My father ____ working hard,and reached his goal.
“Alan,” he often says to me. “If you want something,you have to work for it and never give up. Things do not come ____ in life. ” That is what I learned from my father.
1.A. disaster??? ?? B. loss??? ???? C. success??? ?? D. pity
2.A. life??? ???? B. fashion?? ??? C. danger??? ?? D. history
3.A. famous??? ?? B. lucky?? ???? C. rich???? ??? D. born
4.A. taught??? ?? B. worked?? ??? C. studied??? ?? D. slept
5.A. until??? ???? B. towards? ??? C. for???? ???? D. during
6.A. experience?? B. energy?? ??? C. time???? ??? D. money
7.A. kind??? ???? B. poor?? ????? C. strong??? ?? D. lazy
8.A. What??? ??? B. How?? ????? C. Why??? ??? D. When
9.A. discover??? ? B. make?? ???? C. collect??? ?? D. spend
10.A. little??? ??? B. good?? ???? C. much??? ???? D. excellent
11.A. giving??? ?? B. running?? ? C. washing??? ?? D. receiving
12.A. comfortable? B. cheerful?? ? C. nice???? ????? D. hard
13.A. borrow??? ? B. need?? ???? C. afford??? ???? D. pay
14.A. kept?? ???? B. finished?? ?? C. minded?? ?? D. stopped
15.A. really?? ??? B. easily?? ???? C. quietly??? ??? D. slowly
查看答案和解析>>
科目:初中英語 來源:2012-2013學年江蘇省南京市建鄴區(qū)中考一模英語試卷(解析版) 題型:其他題
根據(jù)短文內(nèi)容及首字母提示,填寫所缺單詞,并將答案填寫在標號為 72~81 的相應位置上。
In a school some trouble was caused by the students, who were naughty(調(diào)皮的)and didn’t follow the school rules. They often fought with each other and they didn’t f 1. each other. One day a new teacher came to this school. When he heard that, he came up w 2. a good idea. He told each of his students to b 3. a clear plastic bag and a bag of potatoes to school. For every person they didn’t want to forgive in their lives, they chose a potato, wrote the person’s name on it, and put it in the plastic bag.
Some of their bags were very h 4. . They were then told to carry this bag with them e 5. for one week. They would put it beside their bed at night, on the seat when they s6. in a car or on a bus, and next to their desk at school. Days of carrying the bags a 7. with them made students get to know what a weight they were carrying in their minds. And they had to pay so much attention to it all the time t 8. they didn’t forget it or leave it in embarrassing places. As time p 9. by, the potatoes went bad and made people feel sick.
Too often we think of tolerance(容忍)as a gift to other people, and it clearly is for ourselves! If we choose to keep our sadness and hatred (仇恨) in our hearts, we will have to carry them around all our lives. After that, the students got on w 10. with each other and didn’t fight any more. Learn to forgive, and you will be happier at the same time.
查看答案和解析>>
科目:初中英語 來源:2012-2013學年北京市延慶縣九年級上學期期末考試英語試卷(解析版) 題型:閱讀理解
It is easy for us to tell who our family members are, but do plants recognize(識別) their own family? Some do, scientists say, according to a report by Science News in early 2010.
Guillermo P. Murphy and Susan Dudley are two plant scientists from McMaster University in Hamilton, Canada. They did a few experiments with Jewelweeds, a kind of flower that grows in wet, shady spots. They found that the flowers seem to know their own flower family. In their experiments, Murphy and Dudley planted jewelweeds in pots with either siblings or strangers.
When jewelweeds were planted in pots with strangers, the plants started to grow more leaves than if they had been planted alone. This response(反應)suggests that plants are competing with strangers for sunlight, since a plant with more leaves can receive more light and make more food. Jewelweeds usually grow in the shade, where sunlight is not enough.
When jewelweed seedlings(幼苗)were planted with siblings, they grew a few more branches than they usually would if they were alone – but they did not start growing lots of extra leaves. This behavior suggests the plants are more likely to share resources, rather than compete.
According to the Science News report, Jewelweeds are not the first plants that plant scientists have studied for family recognition. In 2007, Dudley and her team studied the Great Lakes sea rocket, a plant that grows on the beach – where it may be hard to get fresh water. In that experiment, the scientists found that when sea rockets were planted with siblings, they tolerated each other. But when they were planted with strangers, the sea rockets reacted by working extra hard to grow lots of roots.
Dudley says this just because sea rockets, on the beach, get plenty of sun but struggle for water – so when they’re threatened, they compete for water. Jewelweeds have plenty of water but have to compete for sunshine, so they grow more leaves.
1. What does the underlined word siblings mean?
A.Flowers come from foreign countries.
B.Plants growing in different environments.
C.Flowers planted with lots of strangers.
D.Plants that are the same kind.
2. In the text, the writer mentioned the experiments of Jewelweeds to .
A.make a comparison B.introduce a topic
C.describe a pretty flower D.build a new theory
3. According to the passage, flowers planted alone will .
A.grow more leaves than those planted in groups
B.become taller than those with more branches
C.grow fewer leaves than those planted with strangers
D.become ill easily because they can’t get enough shade
4. What can be the best title for the passage?
A.New Discoveries about Plants
B.How Plants Compete with Each Other
C.Family Recognition among Plants
D.Jewelweeds and the Great Lakes Sea Rockets
查看答案和解析>>
湖北省互聯(lián)網(wǎng)違法和不良信息舉報平臺 | 網(wǎng)上有害信息舉報專區(qū) | 電信詐騙舉報專區(qū) | 涉歷史虛無主義有害信息舉報專區(qū) | 涉企侵權舉報專區(qū)
違法和不良信息舉報電話:027-86699610 舉報郵箱:58377363@163.com