单选题这些舱盖通常是用电力或液压驱动的。（）AThese hatches are usually driven by electric or hydraulic power.BThese hatch covers are usually driven by electric or hydraulic power.CThese hatch covers are usually driven by electric.DThese hatch covers are usually driven by hydraulic power.
单选题
这些舱盖通常是用电力或液压驱动的。（）
A
These hatches are usually driven by electric or hydraulic power.
B
These hatch covers are usually driven by electric or hydraulic power.
C
These hatch covers are usually driven by electric.
D
These hatch covers are usually driven by hydraulic power.
参考解析
解析：
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相关考题：
这些舱盖通常是用电力或液压驱动的。（）A、These hatches are usually driven by electric or hydraulic power.B、These hatch covers are usually driven by electric or hydraulic power.C、These hatch covers are usually driven by electric.D、These hatch covers are usually driven by hydraulic power.
These hatch covers are usually driven by electric or hydraulic power.（）A、这些舱盖通常是用电力驱动的B、这些舱盖通常是用液压驱动的C、这些舱盖通常是用电力或液压驱动的D、这些舱盖通常是用油压或液压驱动的
根据《液压电梯制造与安装安全规范》（GB21240—2007）中液压电梯的定义，判断下列说法不正确的是（）。A、液压电梯是依靠电力驱动液压泵输送液压油到液压缸，直接或间接驱动轿厢的电梯（可以使用多电动机、液压泵和/或液压缸）B、液压电梯是通过电力驱动的泵传递液压油到油缸，柱塞通过直接或间接的方式作用于轿厢，实现轿厢下行C、液压电梯是通过电力驱动的泵传递液压油到油缸，柱塞通过直接或间接的方式作用于轿厢，实现轿厢上行D、液压电梯通过载荷和轿厢重力的作用使油缸中的液压油流回到油箱，实现轿厢下行
单选题These hatch covers are usually driven by electric or hydraulic power.（）A这些舱盖通常是用电力驱动的B这些舱盖通常是用液压驱动的C这些舱盖通常是用电力或液压驱动的D这些舱盖通常是用油压或液压驱动的
单选题箱形货舱盖的开关由（）完成。A专设液压装置B船上或港口起货机械C绞索钢索驱动D舱盖本身专设机械