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
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
参考解析
解析：
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单选题开关舱的工作通常是由船员来做。（）AThe work of opening and closing hatches is usually done by crew members.BThe work of opening and closing hatch covers is usually done by crew members.CThe work of opening hatch covers is usually done by crew members.DThe work of closing hatch covers is usually done by crew members.
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