题目
题型:不详难度:来源:
Vitamin C won"t stop a cold
It is claimed that Vitamin C helps by increasing white blood cells. However, many tests have shown that it does not prevent colds. At best, it only slightly reduces the rime of symptoms.
Staying indoors won"t protect you
One of the most likely sources of cold viruses is your computer mouse or desk. A study of the cold virus in offices found that 47% of desktops, 46% of computer mice and 45% of telephones had cold viruses on them.
Wrapping up warm won"t protect you
Colds are more common in autumn and winter. That"s because the cool, wet and cold weather drives people indoors, where viruses may more easily jump from one person to another. And the distinct peak in colds(感冒高峰) is in September and early January, which is likely due to the return of students to schools and colleges after the summer and winter vacation.
Old granny"s chicken soup is right
Granny"s chicken soup is an old cure for colds since a long time ago. Scientists say it is true. Chicken soup does help cure a cold. Many canned soups are just efficient as homemade ones.
小题1: It is ______ that makes you uncomfortable when getting a cold.
A.the virus itself | B.Vitamin C |
C.the terrible cold symptom | D.your own immune system |
A.there are many desks | B.there are many telephones |
C.there are many cold viruses | D.there are many computer mice |
A.it"s in autumn and winter |
B.the weather is cool, wet and cold |
C.students return to schools and colleges |
D.viruses can jump from one person to another more easily |
A. 有效的 B. 美味的 c. 值钱的 D. 方便的
答案
小题1:D
小题1:C
小题1:D
小题1:A
解析
核心考点
试题【Do you know that it is your own immune system working against the virus that mak】;主要考察你对科普环保类等知识点的理解。[详细]
举一反三
Cows produce a lot of wastes. One cow can create 30 gallons of wastes each day. Now imagine the output of over 1,000 cows at Blue Farm. That’s really a big amount.
When farmers clean their barns, they put the wastes in a big heap, and spread some of them on their fields for fertilizer(肥料). But now places like Blue Spruce Farm have a new way of using cow wastes. They use them to produce electricity.
Here’s how it works: A big machine moves back and forth cleaning the barn floor. “The cows aren’t bothered,” says Marie Audet. “They are animals of habit; they get used to it, and just lift one foot and then another to let it go by.”
The machine pushes the manure into a big 600-gallon tank like a small swimming pool. The tank is called a digester (化粪池) because what happens there is just like what happens inside a cow: Bacteria(细菌) get to work and continue to digest the manure.
Methane gas (甲烷、沼气)in the atmosphere is known as a “greenhouse” gas because it keeps heat just like a greenhouse does, causing our planet to warm up. That’s an environmental concern. But the digester has a good result. Its gas is kept and used to power electric generators (发电机).
At Blue Farm, the generators make enough electricity to power 400 homes. The Audet family sells the extra electricity they can’t use themselves.
小题1:We learn from the text that the Audet family is using cow wastes to ______.
A.make electricity | B.produce fertilizer | C.build their farm | D.feed the cows |
A.Marie Audet does the work | B.The job is done by machine |
C.The cows lift the cow wastes | D.Bacteria get to work on them |
A.The power of moving water. | B.The heat of burning coal. |
C.The power of sunlight. | D.The heat of the methane gas |
A.reducing | B.saving | C.recycling | D.changing |
A.To introduce a new way of making electricity | B.To explain how a new energy works better |
C.To show a new rebuilding plan for a big farm | D.To explain the reasons for green house effect |
The girls came up with the idea last summer when they saw charms were popular with kids.
They talked with their parents about the idea.Since then they have sold enough charms to buy a bike for Hannah.
The girls collect bottle caps and then clean them.They find some interesting pictures on the Internet or on paper,and then glue them onto the inside of the caps.There are different kinds of pictures,“Peace signs are popular with girls,and single–letter charms are popular with boys whose names start with those letters,”Emma and Hannah said.
Now,charms can be found everywhere at Dakota Hills Middle School in Eagan.“Students put charms on purses,backpacks ,and their lunchboxes,”said Emma.Emma and Hannah also have a shop on the Internet.They hope they can sell their charms to more kids.They’re thinking about selling their charms at the Eagan Market Festival next summer.
Their business is not only for getting money.At their Valentine’s sale,20%of the income( 收入) went to charity.
小题1:What are Emma and Hannah?
A.They’re waiters. | B.They’re sellers. |
C.They’re students. | D.They’re charm makers. |
A.About a year ago. | B.About two months ago. |
C.Nearly fifty days ago. | D.Nearly five weeks ago. |
A.Pictures. | B.Signs. | C.Letters. | D.Numbers. |
A.They hope to become rich people. B.They hope to give money to charity.
C.They hope to sell more charms. C.They hope to sell charms in every school.
小题5:Which of th following is TRUE?
A.The two girls love their parents and money. |
B.Boys like charms with signs. |
C.They won’t sell charms next smmer. |
D.The charms are popular with students. |
Internet addiction(上瘾) is(34) in China now. A recent research (35) that 42% Of Chinese young people get quite interested in the web, while only 18% of Americans feel in the same (36) .
What causes IAD? Some people believe that It"s the lack(缺乏) of family care. Most children in China are the (37) ones in their families. They are only told to (38) hard, but few really care about their personal interest .So some children would like to keep (39) away from the real world
How can people stay away from IAD? Don t get online any more, go back to the real world and if it doesn"t work, go to see the (40)___,
小题1: A. disease B.task C. rule
小题2: A .home B.online C. in school
小题3: A. because of B. Out of C. instead of
小题4:A. changing B. increasing C .becoming less
小题5:A. shows B. notices C knows
小题6:A. road B. way C. country
小题7: A. best B .worst C. only
小题8:A. study B. play C. think
小题9: A. themselves B.their parents C. their teachers
小题10: A. friend B. teacher C.doctor
We have an hour for lunch. We eat lunch and chat there. We can also listen to pop music in the hall. We eat fruit and vegetables every day.
We have Maths every day because I think Maths is very interesting to us. I love computers, so we have Computer Studies every day. We wear school uniforms, but we do not wear ties. The classes are quite small. There are 15 students in each class.
There is a park on one side of our school and a shopping mall on the other. We have a big library with lots of useful books. We also have a tennis court and a swimming pool.
There are lots of clubs and after-school activities. We only have half an hour of homework every day, and we do not do homework at weekends. Every month, we go on a school trip to a museum or a theater.
小题1:How many hours for lessons are there in my school?
A.Five hours. | B.Six hours. | C.Four hours. | D.Three hours. |
A.Half an hours. | B.One hours. | C.One and a half hours. | D.Two hours. |
A.Because it is useful. | B.Because it is the main subject. |
C.Because we’re interested in it. | D.Because I’m going to be a Maths teacher. |
A.Ten. | B.Sixteen. | C.Fourteen. | D.Fifteen. |
A.用 | B.在……下 | C.和……一起 | D.有 |
A.Every week. | B.Every day. | C.Every month. | D.Every two months. |
A.My school. | B.My ideal subject. |
C.My ideal school. | D.My ideal park. |
Cambridge was already a 40 town long before the first students and teachers arrived 800 years ago. It grew up by the river Granta, and the river was once 41 the Cam. A 42 was built over the river as early as 875. So the town got its name "Cambridge".
In the fourteenth and fifteenth centuries more and more land was used for college buildings. The town grew much 43 in the nineteenth century after the opening of the railway in 1845. Cambridge became a 44 in 1951 and now it has a population of over 100, 000. Many young students in other countries 45 to study at Cambridge. Thousands of people from all over the world come to visit the university town. It has become a famous place all around the world.
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