首頁
題庫
網(wǎng)課
在線???/a>
桌面端
登錄
搜標題
搜題干
搜選項
0
/ 200字
搜索
單項選擇題
Care must be taken to condition the ()in the boiler to prevent scaling, and corrosion, which can weaken the pressure vessel.
A.water
B.fuel
C.steam
D.air
點擊查看答案&解析
在線練習
手機看題
你可能感興趣的試題
單項選擇題
The power and torque capability of the steering system must be such that the rudder can be swung from ()one side to()the other side with the ship at maximum speed.
A.35°;35°
B.35°;30°
C.15°;15°
D.28°;60°
點擊查看答案&解析
手機看題
單項選擇題
Certain requirements must currently be met by a ship’s steering system.There must be ()independent means of steering, although where two identical power units are provided, an auxiliary unit is not required.
A.one
B.two
C.three
D.four
點擊查看答案&解析
手機看題
微信掃碼免費搜題