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相对海平面变化（relative sea level change）
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The study,published in the British journal Nature,adds to a growing scientific chorus of warnings about the pace and consequences rising oceans．It also serves as a corrective to a massive report issued last year by the Nobel-winning UN Intergovernmental Panel on Climate Change(IPCC),according to the authors.
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B.change their opinions
C.better predict climate change
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当与他人比较时，个体觉得自己没有得到所应得的那么多，这一现象称为（）A、社会比较效应B、相对剥夺（relative deprivation）C、适应水平效应（adaption-level effect）D、相对替代（relative displacement）
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You performed an incremental level 0 backup of a database: RMAN BACKUP INCREMENTAL LEVEL 0 DATABASE; To enable block change tracking after the incremental level 0 backup, you issued this command: SQL ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE ‘ /mydir/rman_change_track.f’; To perform an incremental level 1 cumulative backup, you issued this command: RMAN BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE; Which three statements are true?（）A、Backup change tracking will sometimes reduce I/O performed during cumulative incremental backups.B、The change tracking file must always be backed up when you perform a full database backup.C、Block change tracking will always reduce I/O performed during cumulative incremental backups.D、More than one database block may be read by an incremental backup for a change made to a single block.E、The incremental level 1 backup that immediately follows the enabling of block change tracking will not read the change tracking file to discover changed blocks.
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Examine the following command used to perform incremental level 0 backup： RMAN BACKUP INCREMENTAL LEVEL 0 DATABASE； To enable the block change tracking， after the incremental level 0 backup you issued the following command： SQL ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE ’/mydir/ rman_change_track.f’；To perform incremental level 1 cumulative backup， you issued the following command： RMAN BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE； Which two statements are true in the above situation？（）A、 The block change tracking data will be used only from the next incremental 0 backup.B、 The incremental backup will use change tracking data for accomplishing the backup.C、 The incremental backup will not use change tracking data for accomplishing the backup.D、 The block track file will scan all the blocks and create bitmap for all the blocks backed up in the level 0 backup.
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You enable block change tracking. You issue the following command: BACKUP INCREMENTAL LEVEL 0 DATABASE; The next day, you issue the following command: BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE; Which statement about the use of the change tracking file is true?（）A、RMAN reads the block change tracking file only when it performs the incremental level 0 backup.B、RMAN reads the block change tracking file when it performs both incremental backups.C、RMAN reads the block change tracking file only when it performs the incremental level 1 backup.D、RMAN does not read the block change tracking file when it performs either incremental backup.
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单选题当与他人比较时，个体觉得自己没有得到所应得的那么多，这一现象称为（）A
社会比较效应B
相对剥夺（relative deprivation）C
适应水平效应（adaption-level effect）D
相对替代（relative displacement）
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单选题The average height of the surface of the sea for all stages of the tide over a 19 year period is called（）.A
mean high waterB
mean low waterC
half-tide levelD
mean sea level
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单选题根据文章第四段，下列说法不正确的是（ ）。A
海平面上升包括绝对上升和相对上升两种类型B
气候变化可以影响海平面的绝对上升C
海平面的绝对上升是可以控制的D
海平面的相对上升是可以控制的
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a jammed three-way thermostatic valveC
chromate PH too lowD
a high level in the surge tank
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单选题The best estimate of the wind direction at sea level can be obtained from observing the direction of the（）.A
cloud movementB
vessel headingC
wavesD
swells
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