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In a two-stroke engine, there are always a series of openings known as (), and in some circumstances, there are also openings known as (), in the part of the cylinder liner.
A . scavenging air ports;exhaust ports
B . inlet ports;scavenging air ports
C . scavenging air ports;inlet ports
D . exhaust ports;inlet port
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What are the two main types of stud link chain().
A . Oil Rig chain and Oil Field Stud Link chain
B . Flash-butt welded chain and Di-Lok chain
C . Flash-butt welded chain and Oil Rig chain
D . Oil Field Stud Link chain and Flash-butt welded chai
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A number of cylinder liners are enclosed in one cast iron casing to form a ().
A . cylinder cover
B . cylinder block
C . cylinder frame
D . bed-plate
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A number of bags are worn-out()a certain extent.
A . at
B . in
C . on
D . to
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If there are a number of survivors in the water after abandoning ship,they should().
A . tie themselves to the unit so they won't drift with the current
B . form a small circular group to create a warmer pocket of water in the center of the circle
C . send the strongest swimmer to shore for assistance
D . form a raft by lashing their life preservers together
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A main bearing consists of two shells which are secured by means of studs and ().
A . tie rods
B . through bolts
C . lead wires
D . bearing ca
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Alejandra: There are a lot of trees .
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There are a number of students who want to join the drama club.Revision: ______________________ want to join the drama club.
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There are two main ways of developing a garment shape:
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Hot dishes are the main course, and usually there are even numbers of hot dishes, four, six or eight, because Chinese people believe that all good things come in pairs.
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In the US, if there are a lot of guests, most tables are round.
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There has been a collision ______ a number of cars on the main road to town.
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Most dictionaries will tell you a number of (21) about a language. There are three things
Most dictionaries will tell you a number of (21) about a language. There are three things in particular that (22) important. These three things are spelling, pronunciation, and meanings.
The first and most obvious thing is that a dictionary will (23) you the spelling of a word. If you're not sure about the spelling of a word, you can try to find the correct spelling in a dictionary. Words are listed in alphabetical order--a, b, e, and so on. For example, on a dictionary page the word "poor"--p, o, o, r--comes before "poverty"--p, o, v, e, r, t, y and the word "poverty" comes (24) the word "power"--p, o, w, e, r. The words are always given in alphabetical order.
The second thing a dictionary will tell you is (25) . Most dictionaries give the pronunciation of a word in a special kind of alphabet. This special alphabet is called a phonetic, or sound alphabet. The phonetic spelling will tell you generally (26) a word is pronounced. There are a few different phonetic alphabets. Many dictionaries use the International Phonetic Alphabet to show pronunciation.
The (27) thing a dictionary will tell you is the meanings of words. You can (28) a word and find out what it means. Many words have more than one meaning, and a good dictionary will explain all of the word's meanings. For example, in English the common word "get" has over 20 different meanings. The meaning, of course, (29) the sentence in which the word is used.
These three things--spelling, pronunciation, and meanings--are some of the important (30) that you learn from dictionaries.
21. A. thing
B. people
C. things
D. books
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There are still a number of factories in the area around Littleton.
A.Right
B.Wrong
C.Doesn't say
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请填写衔接词,提示一下,第二空的意思是公认的 There are a number of drawbacks to people using Facebook as a way of communicating ____________ it is____________one of the most common social networking platforms for both individuals and businesses.
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Vowel sounds are classified by a number of factors: the position of the tongue in the
是
否
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There are a lot of()in the gym.
A.A.swimming pools
B.B.classes
C.C.trainers
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There is a limited number of books on this subject in the library.
A.large
B.total
C.small
D.Big
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No one knows exactly how many disabled people there are in the world, but estimates suggest the figure is over 450 million. The number of disabled people in India alone is probably more than double the total population of Canada.
In the United Kingdom, about one in ten people have some disability. Disability is not just something that happens to other people: as get older, many of us will become less mobile, hard of hearing or have failing eyesight.
Disablement can take many forms and occur at any time of life. Some people are born with disabilities. Many others become disabled as they get older. There are many progressive disabling diseases. The longer time goes on, the worse they become. Some people are disabled in accidents. Many others may have a period of disability in the form. of a mental illness. All are affected by people's attitude towards them.
Disabled people face many physical barriers. Next time you go shopping or to work or visit friends, imagine how you would manage if you could not get up steps, or on to buses and trains. How would you cope if you could not see where you were going or could not hear the traffic? But there are other barriers: prejudice can be even harder to break down and ignorance inevitably represents by far the greatest barrier of all. It is almost impossible for the able-bodied to fully appreciate what the severely disabled go through, so it is important to draw attention to these barriers and sow that it is the individual person and their ability, not their disability, which counts.
The first paragraph points out that ______.
A.there are many disabled people in the world
B.the number of disabled people in India is the greatest
C.India has much more disabled people than Canada
D.it is impossible to get an exact figure of the world' s disabled people
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Suppose that a price of $30 per month, there are 30,000 subscribers to cable television in Small Town. If Small Town Cablevision raises its price to $40 per month, the number of subscribers will fall
A.0.66
B.0.75
C.1.0
D.1.4
E.2.0
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When farmers raise hogs, there are a number of external costs. In particular, hogs generate methane gas. If the marginal external cost is $100 per hog and the government imposes a tax of $200 per hog,
A.toofewhogswillberaiseD
B.thepricewillbelessthanthemarginalsocialcost.
C.thepricewillbelessthanthemarginalsocialbenefit.
D.thepricewillbelessthanthemarginalcosttohogfarmers.
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Crime is a very serious problem in Britain. One sort of crime which particularly worries people is juvenile delinquency—that is, crimes committed by young people. For some years juvenile delinquency had been increasing. There are two main sorts of juvenile crimes: stealing and violence. Most people do not understand why young people commit these crimes. There are, I think, a large number of different reasons.
These crimes are not usually committed by people who are poor or in need. Young people often dislike and hate the adult world. They will do things to show that they are rebels. Also in Britain today it is easier for young people to commit crimes because they have more freedom to go where they like and more money to do what they like.
There are two other possible causes which are worth mentioning. More and more people in Britain live in large towns. In a large town no one knows who anyone else is or where they live. But in the village I come from crimes are rare because everyone knows everyone else.
Although it is difficult to explain, I think the last cause is very important. Perhaps there is something with our society which encourages violence and crime. It is a fact that all the time children are exposed to films and reports about crime and violence. Many people do not agree that this influences the young people, but I think that young people are very much influenced by the society they grow in. I feel that the fault may be as much with our whole society as with these young people.
6. From the passage we know that many British people are confused about ().
A. the cause of juvenile crimes
B. the rise of the crime rate
C. the problem of crimes in their country
D. the various kinds of juvenile delinquency
7. One reason why young people in large cities are more likely to commit crimes is that ().
A. nobody knows anything about others
B. they are free to move
C. they live a better life
D. they need more money
8. According to the passage, which groups of the following young people are LEAST likely to commit crimes?
A. Those living in big cities
B. Those who are in need of help
C. Those who are very poor
D. Those living in the countryside
9. Unlike many others, the author holds that one important cause for juvenile delinquency is that().
A. young people nowadays do not like adult world
B. young people in Britain today are freer than before
C. too many young people have come to live in big cities
D. young people are influenced by crime and violence in films and newspapers
10.According to the passage, which is to blame for juvenile crimes, apart from the young people themselves?
A. The adult world
B. Their parents
C. The development of the cities
D. The society
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Vocabulary and Structure Directions: There are a number of incomplete sentences in this part. For each sentence there are four choices marked A), B), C) and D). Choose the ONE that best completes the
A.accompany
B.accomplish
C.accommodate
D.account
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There are three principal methods of chartering a tramp ship, they are ().
A、time charter
B、bareboat charter
C、voyage charter
D、conference lines
此题为多项选择题。