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【简答题】
Every spring scores of people flock to the Buzzard Festival at Hinckley, Ohio. They come to watch for buzzards. Most would be glad just to take a look at a buzzard. If they do see one of these' flying garbage cans', it will probably be circling high in the sky. From there it can watch the ground for signs of the waste and the dead animals on which it feeds. The buzzard is the ugliest bird in the United States. In fact, it may well be the ugliest bird in the world. It has a small, bare, pink head. Its thick body is covered with dark, rough feathers. In spite of its looks, the buzzard is important to the people of Hinckley. It is their first sign of spring. After a winter in the south, buzzards return to their homes in the north. In the Hinckley area, they always return on March 15. No one knows why. But they have come back to Hinckley Ridge on that day, sure as clocks work, for at least forty years. The excitement starts in February. By the middle of March it has reached a high peak. Bets are placed. Prizes go to the person who sees the first buzzard. Radio stations and newspapers tell of the coming festival. And on the weekend after March 15 the people of Hinckley hold their Buzzard Festival. The people come and look around. They chat. They eat their fill of pancakes and sausages. Then they drive past Buzzard's Roost on Hinckley Ridge. A lot of them stop near the road at the stand set up to give information to visitors. There they can hear, from a recording, the main facts about the buzzard. They can see a stuffed buzzard. They can look at some pictures taken of buzzards in other years. With good luck and a strong pair of field glasses, they may sight one or two live buzzards high in the sky. Buzzards may be ugly. They may be 'flying garbage cans'. But in Hinckley they are just as welcome as the swallows in Capistrano, California. It would be a sad spring indeed if the buzzards ever failed to come back to Hinckley Ridge. 小题1:A good title for this story would be __________. A.The Hinckley Buzzard Festival B.Buzzard, the Ugliest Bird C.Why the Buzzard Has a Pink Head D.The Return of“The Garbage Can' 小题2:The buzzard is called the 'flying garbage can' because it __________. A.is ugly B.eats waste and dead animals C.looks like a garbage can D.collect rubbish on the ground 小题3:The surprising thing about Hinckley's buzzards is that_. A.they spend the winter in the south B.they come very close to the town C.they return on the same day each year D.both buzzards and swallows return to Capistrano on March 15 小题4:At the information stand, visitors to Hinckley's Buzzard Festival can _________. A.learn some facts about the buzzard B.easily see a live buzzard C.take some pictures with the background of live buzzards D.feed their fill of pancakes and sausages to buzzards
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【单选题】What is the difference between a unique constraint and a primary key constraint?
A.
A unique key constraint requires a unique index to enforce the constraint,whereas a primary key constraint can enforce uniqueness using a unique key of or nonunique index
B.
A primary key column can be NULL,but a unique key column cannot be NULL
C.
A primary key constraint can use an existing index ,but a unique constraint always creates an index
D.
A unique constraint column can be NULL,but primary key columns  can  not be NULL
【单选题】细菌内毒素的主要化学成分是
A.
脂类
B.
多糖
C.
核酸
D.
脂多糖
E.
糖蛋白
【简答题】内毒素的主要化学成分是 ,其毒性主要是由 决定的。
【单选题】What is the primary purpose of medical education?
A.
For students to learn what it means to be a physician.
B.
To better prepare students for the challenges they will face throughout their professional careers.
C.
Possess a body of knowledge and a set of skills that can be applied in the practice of medicine.
D.
To meet the public's expectations of a doctor.
【单选题】While the Pilot is maneuvering the vessel to a dock,what is the PRIMARY responsibility of the watch officer?
A.
Insure that helm and throttle orders given by the Pilot are correctly executed
B.
Judge the appropriateness of the Pilot's orders and countermand them if necessary
C.
Supervise the signaling and flag etiquette
D.
Record the bells and their times in the bell book
【简答题】起动时依据____确定基本喷油持续时间。
【单选题】For what primary purpose was the Aswan Dam built?
A.
Traffic.
B.
Irrigation
C.
Electricity.
【单选题】内毒素的主要化学成分为()
A.
肽聚糖
B.
蛋白质
C.
鞭毛
D.
核酸
E.
脂多糖
【判断题】民族一经形成其语言和风俗就固定下来不会改变了。(
A.
正确
B.
错误
【单选题】What is the main idea of this passage?
A.
The difference between the primary school and the secondary school.
B.
The method that pupils get help from the teachers.
C.
The personal development of the pupils in the secondary school.
D.
The function of the secondary school.
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