此题为判断题(对,错)。
A、The genes involved in cancer are all classed as oncogenes.
B、All genes involved in cancer are of a class called tumor suppressor genes.
C、Both oncogenes and tumor suppressor genes are involved in cancer.
D、No unifying classifications can be applied to the genes involved in cancer.
and twelve million golfers.These figures would not surprise most people.But many would be surprised to learn that twenty million Americans ride motorcycles (摩托车).Few people realize that motorcycling is fast becoming one of America’s most popular sports.
According to the Cycle News,many kinds of people enjoy motorcycling.They include black people and white people, businessmen, professionals, and blue-collar workers.Among them, about 55% are businessmen, 3% are in the professions and 9% in government service.
Such information is offered by the Cycle News in the hope of improving the general public’s impression of the sport.The public has tended to believe that all motorcyclists are wild and lawless young men.
There are several things about motorcycling that the average citizen dislikes.A motorcyclist’s appearance has something to do with this dislike.Motorcyclists often look dirty; in fact, they are dirty.On the road, there is little to protect them from mud.For practical reasons, they often dress in old clothing which looks much less respectable than the clothing of people who ride in cars.For the same reason, motorcyclists usually wear dark colors.Perhaps this helps to explain why they are sometimes suspected of having bad natures.
Probably motorcycles themselves also produce anger and fear.They are noisy, though some trucks are even noisier.But trucks are acceptable because they perform. a needed service.Motorcycles, on the other hand, make an uncomfortable noise just to give their riders pleasure.Roaring along quiet streets, they wake sleeping families and make babies cry.
Yet, as motorcycling becomes more and more common, it will be interesting to see how people in general feel about the sport.Perhaps it will someday become as “respectable” as tennis or golf.
11、According to the text, more and more Americans like___.
A.playing tennis
B.playing golf
C.motorcycling
D.car-racing
12、According to the Cycle News,over half of the motorcyclists are _____.
A.black people
B.white people
C.businessmen
D.professionals
13、The Cycle News wants to_________.
A.make motorcyclists lawful citizens
B.improve the image of motorcycling
C.persuade people to buy motorcycles
D.raise the status ofblue-coUar workers
14、Motorcyclists usually wear dark colors because_________.
A.they want to be respectable
B.they want to be impressive
C.the colors look different
D.the colors suit their sport
15、Some people dislike the motorcycle because it is___________.
A.noisy
B.heavy
C.costly
D.illegal
1.Robert Bruce was hiding in a cave to _____.
A.learn how failure could be a next success
B.protect himself from the English enemy
C.think about what failure was
D.watch a spider making a net
2.“ Made it “ in this text means “____”.
A.reached
B.succeeded
C.got it
D.failed
3.Both the “spider story” and Edison’s story tell us mainly about _____.
A.the value of failure
B.famous failure
C.ways of failure
D.the cause of failure
4.The writer tells you to do all the following EXCEPT ____.
A.to think about the cause of your failure
B.to decide on the right goal for yourself in difficulty
C.to remember that you will never fail in your life
D.to consider failure to be normal
5.Which of the following is NOT true? ()
A.Bruce and Edison were successful examples
B.One should always improve things in order to be successful
C.Failure may be regarded as a way towards success
D.Edison also learned a lot from the Robert Bruce’s story
A.If
B.When
C.Even though
D.As soon as
A.since
B.but
C.even though
D.so
A.instead
B.yet
C.though
D.too
A.When
B.Because
C.Though
D.If
A.pleasing
B.to please
C.pleasant
D.to please her