单项选择题
A.heart B.hearts C.mind D.minds
We’ll put off（）until Friday．A.to dischargeB.dischargeC....
单项选择题We’ll put off（）until Friday．
A.to discharge B.discharge C.discharging D.to be discharging
We have finished（）and are ready for sailing．A.loadB.loa...
单项选择题We have finished（）and are ready for sailing．
A.load B.loading C.will load D.to load
To prevent the riser system from buckling under its own...
单项选择题To prevent the riser system from buckling under its own weight，upward tension is provided by the（）.
A.riser stabilizers B.guideline tensioning system C.riser tensioning system D.guideline stabilizers
