Electricity is ________ element.


  1. A.
    a nature
  2. B.
    an natural
  3. C.
    a natural
  4. D.
    an nature
練習(xí)冊系列答案
相關(guān)習(xí)題

科目：初中英語 來源：2011江蘇省宿遷市初中畢業(yè)升學(xué)考試英語試卷 題型：閱讀理解

In old times，man considered lightning to be one of the great mysteries（神秘事物）of nature．In fact a single flash of lightning 1.6 kilometers long has enough electricity to light one million lamps．
The American scientist，Benjamin Franklin，was the first to suggest that lightning is in fact electricity formed between the earth and clouds high above．It happened in 1752．In the same year，he also built the first lightning rod（避雷針）to protect buildings from being struck by lightnings．
Modern science has discovered that lightning is very strong and powerful．A lightning between a cloud and the earth may be as long as 13 kilometers，and travels at a speed of 30 million meters per second．Scientists have the opinion that there are about 2000 million flashes of lightning per year．In the United States alone，it kills almost one person per day．
The safest place to be in during an electrical（電的）storm is a closed car．Outside，one should go close to low ground for cover and not stop under a tree．Also one should stay out of water and away from metal fences．Inside a house people should keep away from open doorways and windows and not touch wires or metal things．
【小題1】From this passage we know lightning is____．

A．one of the great mysteries of nature．
B．electricity high above the earth．
C．a(chǎn) kind of light．
D．the sound from the clouds．
【小題2】In the U．S____．
A．every person can see lightning every day．
B．a(chǎn)t least one person is killed by lightning every day．
C．there are about 6 million flashes of lightning per year．
D．a(chǎn)bout one person per day dies from lightning．
【小題3】During a lightning storm，it would be best if you____．
A．stand under a tree．
B．go outside．
C．stay in a closed car．
D．stop near windows．
【小題4】A lightning rod can______．
A．prevent accidents caused by lightning
B．stop lightning
C．protect buildings from being washed away．
D．delay the coming of lightning
【小題5】A lightning between a cloud and the earth may be 13 kilometers long，and travels at
a speed of ______．
A．30 kilometres per second．
B．3000 kilometres per second
C．3 kilometres per second
D．30，000 kilometres per second

查看答案和解析>>

科目：初中英語 來源：2012屆江蘇省泰興市濟川中學(xué)九年級升學(xué)統(tǒng)一考試（一模）英語試卷（帶解析） 題型：閱讀理解

Rivers are one of our most important natural resources(資源). Many of the world’s great cities are located on rivers, and almost every country has at least one river running through it that plays an important part in the lives of its people.
Since the beginning of history, people have used rivers for transportation. The longest one in the United States is the Mississippi. The lifeline of Egypt is the Nile. To the people of India, the Ganges is great, but it is also important for transportation; ships can travel along it for a thousand miles. Other great rivers are the Congo in Africa and the Mekong in southeastern Asia. The greatest of all for navigation（航海）, however, is the Amazon in Brazil（巴西）. It is so wide and so deep that large ships can go about two thousand miles up it.
Besides transportation, rivers give food to eat, water to drink, water for crops, and chances for fun. In order to increase the supply(供給) of water for crops, engineers sometimes build a dam (大壩)across a river and let a lake form behind the dam. Then people can use the water not only to irrigate(灌溉) their fields but also to make electricity for their homes and industries.
However, large cities and industries that are located on rivers often cause problems. As the cities grow in size and industries increase in number, the water in the rivers becomes polluted with chemicals and other materials. People are learning the importance, however, of doing more to keep their rivers clean if they want to enjoy the benefits of these natural resources.
【小題1】The greatest river for navigation is ________________.

A．the MississippiB．the Nile
C．the MekongD．the Amazon
【小題2】Which is NOT true according to the passage?
A．Many cities are located on rivers.
B．Almost every country has at least one important river.
C．The Nile is in India.
D．Rivers play an important part in the lives of people.
【小題3】When rivers are dammed, people use the water for __________.
A．keeping the rivers clean
B．making electricity
C．washing clothes
D．irrigation and the production of electricity
【小題4】Most water in rivers is polluted with ___________.
A．people’s drinking water too much
B．people’s swimming in the river too much
C．chemicals and other materials
D．people’s building a dam across a river
【小題5】The best title for the passage is _____________.
A．The Importance of RiversB．Rivers in Cities
C．TransportationD．Natural Resources

查看答案和解析>>

科目：初中英語 來源：2010---2011學(xué)年度山西省大同市實驗中學(xué)下學(xué)期七年級第一次月考英語卷 題型：選詞填空

詞匯運用（共10小題，每小題1分，滿分10分）
請根據(jù)文章大意選擇適當(dāng)?shù)膯卧~并用其適當(dāng)形式填入文章中,使文章意思完整。(有兩項多余選項)
money  recycle  divide  help  for  electricity  brush   hard  nobody  as  take  instead
How did we help to save our earth this week? Let me tell you.
First, my family tried to save ___1___. We never left the lights on when leaving the rooms. We turned off the TV when ___2___ was watching it. Mum only used cold water in the washing machine. Second, we started ___3___ this week. We tried to write on both sides of our paper, not just on one side. We also ___4___ our rubbish into different bags. Mum kept the plastic shopping bags from the supermarket to use them __5___ rubbish bags. Third, my family started to save water. We stopped __6___ long baths and had short showers ___7___. We washed the toilet with used water. Mum and dad used less water to do the washing. My sister and I didn’t leave the tap running when we __8___ our teeth. At last, mum and dad began to save gas. Mum used to drive us to school, but now my sister and I started riding our bikes to school. It is 9____ work but good exercise. This week dad and a few of the people in his company also started to go to work in one car and share the costs.
These are great ways ___10___ protect our environment.

查看答案和解析>>

科目：初中英語 來源：2011屆江西省中考模擬考試英語試卷 題型：選詞填空

請閱讀下面短文，掌握其意思，然后從方框中所給方的詞中選出最恰當(dāng)?shù)?0個，用適當(dāng)形式填空。（每小題1分，共10分）

healthy, what, because, ourselves, speech, teach, to, find, isn’t, scientist, that, so
In America, science is a very important class. In middle school we were __【小題1】_ how to solve problems by thinking like a ___【小題2】__. We had to think of a question, guess an answer, and ___【小題3】__ a way to test our guess. There were lots of experiments and other activities. I remember studying how science can explain things like light and electricity.
Our English class is very different from___【小題4】__ in China, more like Chinese class I think! We read lots of books and talked about them, ___【小題5】_ we could understand what we read better. We learned how to know what information is important when we read and what ___【小題6】_ so important. In my class we all gave six ___【小題7】_ to the class during the year. We had to talk in front of the class for six __【小題8】ten minutes!
We also have health classes. In this class, we learned about our bodies and how to take care of ___【小題9】__ by doing things like eating healthy foods, and not doing ___【小題10】__ things like smoking or drugs (毒品). We cooked a little bit, but I was not very good at it!

查看答案和解析>>

科目：初中英語 來源：2014屆內(nèi)蒙古九年級第一學(xué)期期末英語試卷（解析版） 題型：完型填空

Everyone should do something to protect the environment. How did we help to save our earth this week? Let me tell you.

First, my family try to save ??? ???? . We never left the lights on when leaving the rooms. We turn off the TV when ??? ??? is watching it. Mom only uses cold water in the washing machine.

　　Second, we also start recycling this week. We ??? ???? to write on both sides of the paper, not just on one side. We also ??? ???? our rubbish into different bags for bottles, cans, paper and food. Mom keeps the plastic shopping bags from the supermarket to use them again as rubbish bags. These are great ??? ??? to help our environment.

　　Third, my family also save water. We never take long baths and have short showers ??? ???? . We wash the toilet with used water. My sister and I don’t

??? ?? the tap running when we brushed our teeth.

　　At last, mom and dad begin to save gas. Mom ??? ???? to drive us to school, but now my sister and I start riding our bikes to school. It’s hard work ??? ???? good exercise! This week dad and his workmates(同事) also start to go to work together in one ??? ???? and share the cost. This also help reduce greenhouse gases.

　　These are great ways to help protect our environment.

1.A. water????????????? ????????????? ????????????? B. oil????????????? ????????????? ????????????? C. electricity????????????? ????????????? ????????????? D. food

2.A. somebody??? ????????????? B. everybody?? ????????????? C. nobody??? ????????????? ????????????? D. anybody

3.A. want??????? ? ????????????? B. keep??????? C. refuse????? ????????????? ????????????? D. try

4.A. divide????? ????????????? ??? B. check???? ? ????????????? C. buy?? ????????????? ????????????? ????????????? D. change

5.A. ways??? ????????????? ????????????? B. advice????? ????????????? C. information?? ????????????? ??? D. news

6.A. again??? ????????????? ????????????? B. instead???? ????????????? C. already?? ????????????? ????????????? ??? D. too

7.A. leave??? ????????????? ????????????? B. stop???? ????????????? ??? C. finish?? ????????????? ????????????? ????????????? D. watch

8.A. hoped??????? ????????????? B. began????? ????????????? C. used?? ????????????? ????????????? ????????????? D. needed

9.A. or???????? ????????????? ??? B. but???????? ????????????? C. for????? ????????????? ????????????? ??? D. and

10.A. car???????? ????????????? B. bus???????? ? C. subway?? ?? ????????????? ??? D. train

 

查看答案和解析>>

同步練習(xí)冊答案