载油航行时，舱顶空间内的油气气浓度会随着温度的变化而变化，一般温度越高，油气浓度越小。
1、正确错误
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Iftheoperation________carefullyprepared,itwouldnothavebeensuccessful.
Heblamedhispoorperformance_____jetlag.
Theoceansdonotsomuchdividetheworld_______uniteit
Thebookfairhasreceivedapositive________fromreaders.
AfaultlinerunsthelengthofNewZealand,whichmeansthatitoftenhas________.
