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单选题
If you find an extremely large refrigerant leak while using a halide torch, your flame will（）
A
change from blue to orange
B
‘flare up’ and remain lighted
C
probably go out
D
stay blue
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更多 “单选题If you find an extremely large refrigerant leak while using a halide torch, your flame will（）A change from blue to orangeB ‘flare up’ and remain lightedC probably go outD stay blue” 相关考题
考题
I'm afraid we shouldn't go on chatting like this. The new manager could arrive out of blue. What does "out of blue" mean?()
A、with an angry expressionB、unexpectedlywithout warningC、thinking deeplyD、extremely pleased
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A fire is discovered in the bow of your vessel while making way. The wind is from ahead at 35 knots. You should ______.A.remain on course and hold speedB.remain on course but slack the speedC.change course to put the wind on either beam and increase speedD.change course and put the stern to the wind
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To get help from a venture-captial company, you may have to__________.A.put up with unfair terms
B.change your business line
C..enlarge your business scope
D.let them operate your business
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共用题干
Rockets in the SkyIf someone asked you,"What color is the sky?"I expect that you would answer,"Blue."I am afraid that you would be wrong.The sky has no color.When we see blue,we are looking at blue sunlight.The sunlight is shining on little bits of dust in the air.We know that there is air all around the world.We could not breathe without air.Airplanes could not fly without air.They need air to lift their wings.Airplanes cannot fly very high because as they go higher the air gets thinner.If we go far enough away from the earth,we find there is no air.What is the sky?The sky is space.In this space there is nothing except the sun,the moon and all the stars. Scientists have always wanted to know more about the other worlds in the space.They have looked at them through telescopes and in this way they have found out a great deal.The moon is about 384 ,000 kilometers away from the earth.An airplane cann't fly to the moon but there is a thing that can fly even when there is no air. This is rocket.I am sure that you are asking,"How does a rocket fly?"If you want to know,get a balloon and then blow it up until it is quite big.Do not tie up the neck of the balloon.Let go!The balloon will fly off through the air very quickly.The air inside the balloon tries to get out.It rushes out through the neck of the balloon and this pushes the balloon through the air.It does not need wings like an airplane.This is how a rocket works.It is not made of rubber（橡胶）like a balloon,of course.It is made of metal. The metal must not be heavy but it must be very strong.There is gas inside the rocket which is made very hot. When it rushes out of the end of the rocket,the rocket is pushed up into the air.Rockets can fly far out into space.Rockets with men inside them have already reached the moon.Several rockets,without men inside them,have been sent to other worlds much farther away.One day rockets may be able to go anywhere in the space.What color is the sky?A:It is blue. B:It is white.C:It is grey. D:It has no color.
考题
Passage Three
Whenyou stretch out in the sun you can do one of the three things:you can use no suntan oil,an ordinary sun tan oil;or Bergasol.
If you don′t use any sun tan oil when you′re in the sun,you will burn surprisinglyquickly.If you use an ordinary sun tan oil,you will protectyour skin to a lesser or greater degree.How much protection depends on the"protection-factor number"on the bottle.Some oils block out so manyof the sun′s rays and you can stay in the sun all day without burning but youwon′t go very brown,either.
Bergasol will protect your skin like an ordinary sun tan oil.It also has a tan acceleratorthat speeds up the rate at which the sun activates the skin cells that producemelanin(黑色素).It is melanin that gives the skin itsbrown colour.Bergasol enables you to go brown faster,am as the days pass thedifference will become more obvious.Unfortunately,this special formulation isn′tCheap to prepare.So Bergasol is rather more expensive than ordinary sun tanoil.However,the price looks more attractive as you do.
Bergasoi?It makes you go brown faster
Protection Many people imagine that"cover-up"means you don′t get a tan.Nothing to show for yourholiday.
Not so.With"cover-up",you can get brown if you want to.The point of"cover-up"is to protect your skin from the harmful rays of the sunwhich,according to the experts,make your skinlook older.
That′s what Solex Cover-up is allabout--protection for your skin.It has a Sun Protection Factor 8,which makesit suitable for anyone.Find out how it works for you by consulting the SolexSun Chart.On sale wherever Solex is.With Solex Cover-up,you can tan asslowly as you like.As gently as you like.And with much less
chance of peeling.Your tan will lookbetter.Your skin will stay young longer.
Solex Gentle tan..,full protection
Compared with Solex,Bergasol__A.helps one go brown more quickly
B.better protects one's skin
C.is more competitive in price
D.is a better sun tan oil
考题
In May of 1826, the fair-haired youth with the azure blue eyes （ ） for Europe to turn himself into a scholar and a linguist.A.set about
B.set down
C.set out
D.set up
考题
共用题干
Energy CycleDo you find getting up in the morning so difficult that it's painful?This might be called laziness,but Dr. Kleitman has a new explanation. He has proved that everyone has a daily energy cycle.During the hours when you labor through your work you may say that you're“hot”.That's true .The time of day when you feel most energetic is when your cycle of body temperature is at its peak .For some people the peak comes during the morning. For others it comes in the afternoon or evening.No one has discovered why this is so,but it leads to such familiar monologues as:“Get up,John!You'll be late for work again!”The possible explanation to the trouble is that John is at his temperature-and-energy peak in the evening. Much family quarrelling ends when husbands and wives realize what these energy cycles mean,and which cycle each member of the family has.You can't change your energy cycle,but you can learn to make your life fit to it better. Habit can help,Dr. Kleitman believes. Maybe you're sleepy in the evening but you must stay up late anyway .Counteract your cycle to some extent by habitually staying up later than you want to. If your energy is low in the morning but you have an important job to do early in the day,rise before your usual hour. This won't change your cycle,but you'll get up steam and work better at your low point.Get off to a slow start which saves your energy .Get up with a leisurely yawn and stretch.Sit on the edge of the bed a minute before putting your feet on the floor. Avoid the trouble of searching for clean clothes by laying them out the night before .Whenever possible,do routine work in the afternoon and save tasks requiring more energy or concentration for your sharper hours. If one wants to work more efficiently at his low point in the morning,he should_______.A: change his energy cycleB: overcome his lazinessC:get up earlier than usualD:go to bed earlier
考题
共用题干
Knowing Your Real Personality from Sleeping PositionsEveryone has got two personalities—the one that is shown to the world and the other that is secret and real.You don't show your secret personality when you're awake because you can control yourself,but when you're asleep,your sleeping position shows the real you.In a normal night,of course,you often change your sleeping positions.The important position that best shows your se-cret personality is the one that you go to sleep.If you go to sleep on your back,you're a very open person.You nbrmally trust people and you are easily influenced by new ideas.You don't like to make people unhappy,so you never ex-press your real feelings.You're quite shy and you aren't very confident.If you sleep on your stomach,you are a person who likes to keep secrets.You worry a lot and you're always easily becoming sad.You never want to change your ideas,but you are satisfied with your life the way it is.You usually live for today not for tomorrow.If you sleep on curled up,you are probably a very nervous person.You have a low opinion of yourself and often protect yourself from being hurt,so you are very defensive.You're shy and you don't usually like meeting people.You like to be on your own.If you sleep on your side,you have usually got a well-balanced personality.You know your strengths and weaknesses.You're usually careful.You have a confident personality.You sometimes feel worried,but you don't often get unhappy .You always say what you think,even if it makes people angry. Tina hardly tells her secrets to her friends.She probably goes to sleep______.A: on curled upB: on her stomachC: on her backD: on her side
考题
共用题干
Knowing Your Real Personality from Sleeping PositionsEveryone has got two personalities—the one that is shown to the world and the other that is secret and real.You don't show your secret personality when you're awake because you can control yourself,but when you're asleep,your sleeping position shows the real you.In a normal night,of course,you often change your sleeping positions.The important position that best shows your se-cret personality is the one that you go to sleep.If you go to sleep on your back,you're a very open person.You nbrmally trust people and you are easily influenced by new ideas.You don't like to make people unhappy,so you never ex-press your real feelings.You're quite shy and you aren't very confident.If you sleep on your stomach,you are a person who likes to keep secrets.You worry a lot and you're always easily becoming sad.You never want to change your ideas,but you are satisfied with your life the way it is.You usually live for today not for tomorrow.If you sleep on curled up,you are probably a very nervous person.You have a low opinion of yourself and often protect yourself from being hurt,so you are very defensive.You're shy and you don't usually like meeting people.You like to be on your own.If you sleep on your side,you have usually got a well-balanced personality.You know your strengths and weaknesses.You're usually careful.You have a confident personality.You sometimes feel worried,but you don't often get unhappy .You always say what you think,even if it makes people angry. You may find the passage in ______.A: a science magazineB: a guide bookC: a sports newspaperD: a story book
考题
You are maintaining your database in Oracle10g. You find that the number of languages that should be supported in your database has increased. The character set of your database is UTF8. You decide to migrate your database to the AL16UTF16 national character set. How will you migrate your database from UTF8 to AL16UTF16？（） A、 by using the RMAN utilityB、 by using the export/import utilityC、 by using the ALTER DATABASE commandD、 by enabling the change tracking feature
考题
You have joined a new organization as a Database Administrator. The Security Administrator in your organization has kept human errors， such as erroneously dropping users， tables， and important data， to a minimum by carefully granting only the necessary privileges to each user. As a result of several ongoing transactions within your database， you discover that the flashback logs are rapidly increasing in the flash recovery area. To avoid out-of-space errors， you decide to delete the flashback logs from the flash recovery area. How can you delete the flashback logs from the database if your database is up and running？（）A、 Shut down the database using the SHUTDOWN command. Mount the database using the STARTUP MOUNT EXCLUSIVE command and disable Flashback Database using the ALTER DATABASE FLASHBACK OFF statement.B、 Change the parameter setting in the SPFILE for the DB_RECOVERY_FILE_DEST parameter using the ALTER SYSTEM SET DB_RECOVERY_FILE_DEST=’’ SCOPE=BOTH statement while the database is up and running.C、 Shut down the database using the SHUTDOWN command. Mount the database using the STARTUP MOUNT EXCLUSIVE command. Change the parameter setting in the SPFILE for the DB_RECOVERY_FILE_DEST parameter using the ALTER SYSTEM SET DB_RECOVERY_FILE_DEST=’’ SCOPE=BOTH statement. Disable Flashback Database using the ALTER DATABASE FLASHBACK OFF statement.D、 Change the parameter setting in the SPFILE for the DB_RECOVERY_FILE_DEST parameter using the ALTER SYSTEM SET DB_RECOVERY_FILE_DEST=’’ SCOPE=BOTH statement. Shut down the database using the SHUTDOWN command. Mount the database using the STARTUP MOUNT EXCLUSIVE command and disable Flashback Database using the ALTER DATABASE FLASHBACK OFF statement.
考题
While setting up an Oracle database for one of your critical applications， you want to ensure that the database is backed up at regular intervals without your intervention.What should you do to achieve the objective？（）A、configure the database to run in ARCHIVELOG modeB、configure the Flash Recovery Area to enable automatic database backupC、schedule the database backup using DBMS_JOB package after creating the databaseD、schedule the database backup using Recovery Manager （RMAN）commands after creating the databaseE、schedule the database backup using Database Configuration Assistant （DBCA）while creating the database
考题
You executed the following query in your database： FROM V$FLASHBACK_DATABASE_LOG; What would you determine from the output？（）A、the time when the last flashback operation in your database was performedB、the time when the first flashback operation in your database was performedC、a list of flashback operations performed in your database using SCN and timeD、the approximate time and the lowest system change number （SCN） to which you can flash back your database
考题
单选题If you find an extremely large refrigerant leak while using a halide torch, your flame will（）A
change from blue to orangeB
‘flare up’ and remain lightedC
probably go outD
stay blue
考题
多选题Your database is running in the ARCHIVELOG mode. You have configured RMAN for backup and recovery operations. You execute the following command from the RMAN prompt： RMAN CONFIGURE CONTROLFILE AUTOBACKUP ON； After executing this command， in which of the following cases will RMAN make an auto-backup of the control file？ （）Awhen you change the name of a datafileBwhen you drop a table from the databaseCwhen you take an export of the databaseDwhen you back up the database using OS utilitiesEwhen you issue an ALTER SYSTEM SWITCH LOGFILE statementFwhen you issue a BACKUP command from inside the RMAN run block
考题
单选题Your radar displays your ship off center．As you proceed on your course， your ship’s marker moves on the PPI scope while echoes from land masses remain stationary.What is this display called（）.A
Off centerB
True motionC
StabilizedD
Head up
考题
单选题An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.A
restriction in refrigerant pipingB
air and non-condensable gases in the condenserC
water in the refrigerantD
flooding back of liquid refrigerant from the evaporator
考题
单选题The color of the flame on a halide torch without any refrigerant present is （）.A
blueB
greenC
orangeD
purple
考题
单选题In your test database， you find that a user’s session is executing a lot of SQL statements， resulting in the generation of a large number of trace files. While investigating the reason， you find that SQL trace has been enabled at the instance level. You want to disable SQL trace， remotely， only for that user session to reduce the volume of trace data being generated. How do you achieve this objective？（）A
by setting the SQL_TRACE parameter to FALSE in the parameter fileB
by using DBMS_MONITOR.SESSION_TRACE_DISABLE to disable the tracing for the user sessionC
by setting the SQL_TRACE parameter to FALSE by using the ALTER SYSTEM command in the user sessionD
by setting the SQL_TRACE parameter to FALSE by using the ALTER SESSION command in the user session
考题
单选题When it is accepted to remain on the frequency indicated，you should say（）.A
Standing by on VHF frequencyB
Coming to VHF frequencyC
VHF frequency. is the best place for you to stay byD
remaining in frequency. and do not change
考题
单选题What does the paragraph following the passage most probably discuss?A
How to recover your luggageB
Where to go to continue your tripC
When to return to the aircraftD
How to proceed once you are away from the aircraft
考题
单选题You executed the following query in your database： FROM V$FLASHBACK_DATABASE_LOG; What would you determine from the output？（）A
the time when the last flashback operation in your database was performedB
the time when the first flashback operation in your database was performedC
a list of flashback operations performed in your database using SCN and timeD
the approximate time and the lowest system change number （SCN） to which you can flash back your database
考题
单选题You are maintaining your database in Oracle10g. You find that the number of languages that should be supported in your database has increased. The character set of your database is UTF8. You decide to migrate your database to the AL16UTF16 national character set. How will you migrate your database from UTF8 to AL16UTF16？（）A
by using the RMAN utilityB
by using the export/import utilityC
by using the ALTER DATABASE commandD
by enabling the change tracking feature
考题
单选题The large grassland, reaching out far away, looks extremely beautiful ______ the blue and clean sky.A
againstB
aboveC
throughD
past
考题
单选题Your vessel is taking on fuel oil when a small leak develops in the hose and you have ordered the pumping stoppedBefore resuming pumping，you should（）.A
notify the terminal superintendentB
place a large drip pan under the leak and ping the scuppersC
repair the hose with a patchD
replace the hose
考题
单选题You have joined a new organization as a Database Administrator. The Security Administrator in your organization has kept human errors， such as erroneously dropping users， tables， and important data， to a minimum by carefully granting only the necessary privileges to each user. As a result of several ongoing transactions within your database， you discover that the flashback logs are rapidly increasing in the flash recovery area. To avoid out-of-space errors， you decide to delete the flashback logs from the flash recovery area. How can you delete the flashback logs from the database if your database is up and running？（）A
Shut down the database using the SHUTDOWN command. Mount the database using the STARTUP MOUNT EXCLUSIVE command and disable Flashback Database using the ALTER DATABASE FLASHBACK OFF statement.B
Change the parameter setting in the SPFILE for the DB_RECOVERY_FILE_DEST parameter using the ALTER SYSTEM SET DB_RECOVERY_FILE_DEST=’’ SCOPE=BOTH statement while the database is up and running.C
Shut down the database using the SHUTDOWN command. Mount the database using the STARTUP MOUNT EXCLUSIVE command. Change the parameter setting in the SPFILE for the DB_RECOVERY_FILE_DEST parameter using the ALTER SYSTEM SET DB_RECOVERY_FILE_DEST=’’ SCOPE=BOTH statement. Disable Flashback Database using the ALTER DATABASE FLASHBACK OFF statement.D
Change the parameter setting in the SPFILE for the DB_RECOVERY_FILE_DEST parameter using the ALTER SYSTEM SET DB_RECOVERY_FILE_DEST=’’ SCOPE=BOTH statement. Shut down the database using the SHUTDOWN command. Mount the database using the STARTUP MOUNT EXCLUSIVE command and disable Flashback Database using the ALTER DATABASE FLASHBACK OFF statement.
考题
单选题While setting up an Oracle database for one of your critical applications， you want to ensure that the database is backed up at regular intervals without your intervention.What should you do to achieve the objective？（）A
configure the database to run in ARCHIVELOG modeB
configure the Flash Recovery Area to enable automatic database backupC
schedule the database backup using DBMS_JOB package after creating the databaseD
schedule the database backup using Recovery Manager （RMAN）commands after creating the databaseE
schedule the database backup using Database Configuration Assistant （DBCA）while creating the database
考题
单选题While waiting to cross a busy street, you should _____.A
wait a few seconds until the fumes reduceB
stay away from the traffic as far as possibleC
hold your breath until you get to the other side of the streetD
count down for the light to change
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