单选题When have annual carbon emissions quadrupled?ASince the late 18th century.BSince the mid-20th century.CSince the 1950s.DIn a recent 12-month.
单选题
When have annual carbon emissions quadrupled?
A
Since the late 18th century.
B
Since the mid-20th century.
C
Since the 1950s.
D
In a recent 12-month.
参考解析
解析：
从录音中提到的“In fact, annual emissions have quadrupled since the mid-20th century”，可知从自从20世纪中期，每年的碳排放量增加了4倍，因此选B。
从录音中提到的“In fact, annual emissions have quadrupled since the mid-20th century”，可知从自从20世纪中期，每年的碳排放量增加了4倍，因此选B。
相关考题：
—Your French is so good. How long have you been in France?—??____________I was five.A. Until B. Since C. When D. Before
Since all the goods have been cased up according to the S／C, it would be too late to make a change even if we agreed to.(英译中)
It is already twenty years ____ we ____ to know Mr. White in Paris.A. after … gotB. after …have gotC. since … gotD. since …have got
Scientistssayitmaybefiveortenyears_____itispossibletotestthismedicineonhumanpatients.(A)since(C)after(B)before(D)when
If your asphalt barge has operated more than 12 months in saltwater in the 24 month period since it was last dry-docked，when is it required to be hauled out again ________．A.12 months since last dry-dockingB.18 months since last dry-dockingC.24 months since last dry-dockingD.36 months since last dry-docking
The origins of human speech remain a mystery,__________ we have a fairly accurate idea of when writing began.A．onceB．ifC．thoughD．since
The origins of human speech remain a mystery,__________ we have a fairly accurate idea of when writing began.A. onceB. ifC. thoughD. since
Ever since the drivers' strike started, citywide buses have been ( ) running thirty minutes to one hour late.A. finallyB. constantlyC. concurrentlyD. very
It′ s a long time __________ I saw youlast.--Yes, and what a pity! It will be a longtime __________ we see each other again.A.since; before B.when; sinceC.before; when D.before; since
The Craighead Caverns have been known________.A.through historyB.since the time of the Indian nationsC.since 1905D.since divers explored them
You perform differential incremental level 1 backups of your database on each working day and level 0 backup on Sundays， to tape. Which two statements are true about differential incremental backups（）A、The backup performed on Sundays contains all the blocks that have ever been used in the database.B、The backup performed on Sundays contains all the blocks that have changed since the last level 1backup. C、The backup performed on each working day contains all the blocks that have changed since the lastlevel 0 backup.D、The backup performed on Monday contains all the blocks that have changed since the level 0 backup，and every other working day contains all the blocks that have changed since the level 1 backup.
You are managing an Oracle Database 11g database with the following backup strategy：1） On Sunday， an incremental level 0 tape backup is performed.2） Monday through Saturday， a cumulative incremental level 1 tape backup is performed. Which twostatements are true regarding the backups performed（）A、The backup performed in step 1 backs up all blocks that have ever been in use in the database.B、The backup performed in step 2 copies all the blocks changed since the most recent level 0 backup.C、The backup performed in step 1 backs up all the blocks changed since the most recent level 1 backup.D、The backup performed in step 2 backs up all blocks that have changed since the most recent incrementalbackup at level 1
Why would you use the following FLASHBACK TABLE command？（） FLASHBACK TABLE emp TO TIMESTAMP （’11：45’，’hh12：mi’）； A、to undo the changes made to the EMP table since the specified timeB、to restore the EMP table that was wrongly dropped from the databaseC、to view the transactions that have modified the EMP table since the specified timeD、to view the changes made to the EMP table for one or more rows since the specified timeE、to recover the EMP table to a point in time in the past by restoring the most recent backup
You are managing an Oracle Database 11g database with the following backup strategy： 1.On Sunday， an incremental level 0 tape backup is performed. 2.Monday through Saturday， acumulativeincremental level 1 tape backup is performed. Which two statements are true regarding the backups performed（）A、The backup performed in step 1 backs up all blocks that have ever been in use in the database. B、The backup performed in step 2 copies all the blocks changed since the most recent level 0 backup.C、The backup performed in step 1 backs up all the blocks changed since the most recent level 1 backup.D、The backup performed in step 2 backs up all blocks that have changed since the most recent incremental backup at level 1.
单选题Why would you use the following FLASHBACK TABLE command？（） FLASHBACK TABLE emp TO TIMESTAMP （’11：45’，’hh12：mi’）;Ato undo the changes made to the EMP table since the specified timeBto restore the EMP table that was wrongly dropped from the databaseCto view the transactions that have modified the EMP table since the specified timeDto view the changes made to the EMP table for one or more rows since the specified timeEto recover the EMP table to a point in time in the past by restoring the most recent backup
单选题Since many insects have already become（）to DDT, scientists have to look for some new insecticideAactiveBresistantCtoughDgradual
单选题If your asphalt barge has operated more than 12 months in saltwater in the 24 month period since it was last dry-docked，when is it required to be hauled out again? （）A12 months since last dry-dockingB18 months since last dry-dockingC24 months since last dry-dockingD36 months since last dry-docking
单选题Chinatown has been the center of San Francisco’s Chinese community since the 1850s. Its boundaries have expanded significantly since the 1960s, and the neighborhoods built there are generally wealthy.AplentifulBattractiveCfriendlyDrich
单选题When he was fifteen, he was _____ to alcohol, and ever since, he could not get rid of it.AadmittedBtendedCaddictedDterrified
单选题Mordecai finds it hard to understand that some movies were filmed in black and white but are now shown on television in colorAwhite but are now shown on television in colorBwhite, but they are now shown as color on televisionCwhite, and have since been shown as color on televisionDwhite, since showing in color on televisionEwhite, but they have since shown color on television
单选题Which statement about China is NOT true?AIt comes the second among nations in carbon emissions.BIt has five percent of the world’s population.CIt accounted for nearly half of the global increase in emissions in the last decade.DIts carbon emissions have jumped 47％since l990.
单选题63. A when B before C since D afterAABBCCDD