To correct the condition of slugging and flooding back in a refrigeration system, it may be necessary to （）.

A . 4， 2， 1， 3 B . 2， 1， 4， 3 C . 2， 1， 3， 4 D . 1， 2， 3， 4

A . Only one I/O calibration process can run at a time. B . It automates the resource allocation for the Automated Maintenance Tasks. C . It improves the performance of the performance-critical sessions while running. D . It can be used to estimate the maximum number of I/Os and maximum latency time for the system. E . The latency time is computed only when the TIMED_STATISTICS initialization parameter is set to TRUE.

A . suction service valve as a vapor B . suction service valve as a liquid C . discharge service valve as a vapor D . charging valve as a liquid

A .  mklv -t jfslog -y LVname VGname 1 PVname  logform /dev/LVname  chfs -a log=/dev/LVname /filesystemname m ount and unmount filesystem B .  mklv -t jfslog -y LVname VGname PVname  unmount filesystem  vi /etc/filesystems， change entry for lv to point filesystem to new JFS log  mount filesystem C .  mklvcopy -a jfslog -y LVname VGname 1 PVname  chfs -a log=/dev/LVname /filesystemname  unmount and mount file system D .  mklvcopy  -t jfslog -y LVname VGname 1 PVname  logform /dev/LVname  vi /etc/filesystems， change entry for lv to point filesystem to new JFS log  unmount and mount filesystem

A . at B . by C . in D . o

A . cylinder exhaust valve B . air starting valve C . air inlet valve D . cylinder relief valve

A . To avoid immediate danger B . When authorized by the rig superintendent C . To comply with an operator's requirement D . Under no conditio

A、 The hull must be clean B、 There must be calm weather – wind 10 knots or less and a calm sea C、 There must be no currents D、 The depth of the water must be at least one and one-half times the draft

A .  Only one I/O calibration process can run at a time B .  It automates the resource allocation for the Automated Maintenance Tasks C .  It improves the performance of the performance-critical sessions while running D .  It can be used to estimate the maximum number of I/Os and maximum latency time for the system E .  The latency time is computed only when the TIMED_STATISTICS initialization parameter is set to TRUE

A . erase the entry and rewrite B . draw several lines through the entry，rewrite，and initial the correction C . completely black out the entry，rewrite，and initial the correction D . draw one line through the entry，rewrite，and initial the correctio

A . response B . trap C . cet D . capture

A . turn the flywheel B . reduce friction C . overcome inertia D . ignite the fuel

A . discharge service valve as a vapor B . suction service valve as a liquid C . charging valve as a liquid D . condenser purge valve as a vapor

A . changed B . altered C . adjusted D . varied

A . goods B . quantity C . output D . product

A．a poor economic approach to the Social Security retirement program B．the reform. of welfare in the Social Security retirement program C．major policy changes in the Social Security retirement program D．government debt in the Social Security retirement program 此题为多项选择题。

A．Sending B．Being sent C．sent D．Having sent

A．R-Format B．I-Format C．J-Format D．U-Format

A．Cholelithiasis B．Gastritis C．Perforated ulcer D．Incarcerated hernia