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Which of the following can be used to ensure that once a row has been inserted in table TABLEX, the column MAINID in that row cannot be updated?()
A . Define the column MAINID as NOT UPDATABLE
B . Define the column MAINID as a PRIMARY KEY
C . Define the column MAINID as a FOREIGN KEY
D . Define an UPDATE trigger on table TABLEX
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The bottom row of plating next to the keel of a lifeboat is known as the().
A . sheer strake
B . bilge strake
C . garboard strake
D . keel ri
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You plan to have a larger moving window size for the default system-defined moving window baseline because you want to use the adaptive threshold. Which statement factors in this consideration while increasing the size of the moving window?()
A . The collection level for the AWR should be set to BASIC
B . The moving window size must be less than Undo Retention
C . The moving window size should be greater than the Automatic Workload Repository (AWR) retention period
D . The moving window size should be equal to or less than the Automatic Workload Repository (AWR) retention period
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A cold front moving in from the northwest can produce().
A . thunderstorms,hail,and then rapid clearing
B . increasing cloud cover lasting for several days
C . lengthy wet weather
D . low ceilings with thick cirrus cloud
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What type of constraint is used to ensure that each row inserted into the EMPLOYEE table with a value in the WORKDEPT column has a row with a corresponding value in the DEPTNO column of the DEPARTMENT table?()
A . A check constraint on the EMPLOYEE table
B . A unique constraint on the EMPLOYEE table WORKDEPT column
C . A foreign key reference from the DEPARTMENT tables DEPTNO column to the WORKDEPT column of the EMPLOYEE table
D . A foreign key reference from the EMPLOYEE tables WORKDEPT column to the DEPTNO column of the DEPARTMENT table
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We agreed()in front of the building this afternoon.
A . meeting
B . meets
C . met
D . to meet
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Most of us are aware that we are moving all the time.
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Bow to the board. This is the boy. Born here in the workhouse. Moved to the ____ farm. Nine years old today. Time to be moved back here.
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The structure of the discussion section is to move from general to specific information.
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The Front Office is usually near the main entrance to the hall.
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The aortic valve keeps the blood moving from veins to the heart.
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这句话,句尾应该是什么调?We can meet at the front gate at six and go home together.
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I the future with excitement as we are moving to a new house next week.
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According to the text, which of the following people riding in the front do nothave to wear a seat belt ? ()
A.Someone who is backing into a parking space.
B.Someone who is picking up the children from the local school.
C.Someone who is delivering invitation letters.
D.Someone who is under 14.
此题为多项选择题。
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Grandma told the story in a very sad______and we were all moved.
A.sound
B.tune
C.music
D.tone
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We need food because________.<p>1 we need to stay alive 2 we need to grow</p><p>3 we need to move around 4 we need the energy to do work</p>
A、<p>1 only</p>
B、<p>1 and 2 only</p>
C、<p>1,2 and 3 only</p>
D、<p>1, 2 3and 4</p>
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Robyn _______ the cars and forced herself to walk confidently up to the front door,
A.A.weaved her way through
B.B.lost her way to
C.C.tried her way for
D.D.found her way from
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We know that many animals de not stay in one place. Birds, fish and other animals move from one place to another at a certain time. They move for different reasons: most of them move to find food more easily, but others move to get away from places that are too crowded.
When cold weather comes, many birds move to warmer places to find food. Some fishes give birth in warm water and move to cold water to feed. The most famous migration (迁移) is probably the migration of fish, which is called "salmon". This fish is born in fresh water but it travels many miles to salt water. There it spends its life. When it is old, it returns to its birthplace in fresh water. Then it gives birth and dies there. In northern Europe, there is a kind of mouse. They leave their mountain homes when they become too crowded. They move down to the low land. Sometimes they move all the way to the seaside, and many of them are killed when they fall into the sea.
Recently, scientists have studied the migration of a kind of lobster (龙虾). Every year, when the season of bad weather arrives, the lobsters get into a long line and start to walk across, the floor of the ocean. Nobody knows why they do this, and nobody knows where they go.
So, sometimes we know why humans and animals move from one place to another, but at other times we don't. Maybe living things just like to travel.
Most animals move from one place to another at a certain time to ______.
A.give birth
B.enjoy warmer weather
C.find food more easily
D.find beautiful places
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The door opens to reveal a row of desks, blackboards dense with chalked up grammar a
A.A.filled in
B.B.loaded with
C.C.involved with
D.D.surrounded with
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Little ___that we were watching his every move, so he seemed to be going his own way.
A.realized he
B.he didn’t realize
C.did he realize
D.didn’t he realize
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We lived in a small town when I was a small child, and we moved to Shanghai later bec
A.A.()
B.B.simple sentence
C.C.compound sentence
D.D.complex sentence
E.E.compound-complex sentence
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Mr. Smith is telling two funny stories of his police work. I remember catching a “thief” in a clothes shop once. It was strange. The man was hiding a yellow sweater inside his coat. I thought he had stolen it, so I caught him. We found later that his wife gave him the sweater for his birthday, but he hated it. He just wanted to return it to the shop for money, but he didn’t want his wife to see him! We soon let him go. Another day, a man called Bob went into a bank on Sixth Street. He wrote on the back of an envelope, “Give me the money! Or I’ll kill you. ” and gave it to the bank clerk. She gave him $100,000 and the man ran away. Then we received a phone call from the bank clerk. She told us to go to the man’s house in Candy Town and get him. We caught him as soon as he got out of the elevator. He couldn’t believe that we found him so quickly. We told him that the front of the envelope he used had his name and address on it!
小题1:What does Mr. Smith do?
A. A bank clerk
B. A policeman
C. A thief
小题2:Mr. Smith caught the man in the clothes shop ___________.
A. by exchange
B. by mistake
C. by accident
小题3:Why did the man return the sweater to the shop?
A. Because he didn’t want his wife to see it
B. Because he liked money more than the sweater
C. Because he hated it and wanted to get the money back
小题4:Bob was caught so quickly because ___________.
A. his address was found on the envelope he used
B. he received a phone call from the bank clerk
C. the police waited for him outside the elevator
小题5:What do you think of Bob?
A. He is brave
B. He is careful
C. He is careless
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M: You’re very sad today. W: Yeah. It’s Carl. He was very angry with me yesterday and I was very angry with him, and so we had a row and now we’re not talking to each other. What does the underl
A.Boating.
B.Quarrel.
C.Conversation.
D.Talk.
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In the west of China, people plant rows of trees to prevent the wind _______ the earth away.
A.blowing
B. blows
C. to blow
D. blew