正常钻进过程中钻井泵的出口压力一般为()
A、1.0~1.2MPA
B、15~25MPA
C、100~200MPA
D、200~400MPA
参考答案:B
During storm conditions on a vessel,the mooring tensions should be adjusted so that().
A.all mooring lines have a different tension
B.the leeward lines have higher tension than the windward lines
C.the maximum tension of the most heavily loaded line does not exceed the safe working load
D.all horizontal tension forces on the windward lines are no greater than the vertical tension forces
某村有年满18周岁以上村民500人,其中有100名村民联名提出罢免村委会主任。经村民会议投票表决,下列选项中哪个是罢免案被通过的最低人数要求( )
A.125人同意
B.126人同意
C.250人同意
D.251人同意