單項(xiàng)選擇題

我們每航次拆卸一次吊桿。（）

A. We dismantle the jumbo boom twice a voyage.
B. We dismantle the derricks once a voyage.
C. We examine the derricks once a voyage.
D. We dismantle the heavy derricks once a voyage.

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單項(xiàng)選擇題

每一個(gè)艙蓋由兩個(gè)或更多的蓋板組成。（）

A. Each hatch consists of two panels.
B. Each hatch cover consists of two panels.
C. Each hatch consists of two or more panels.
D. Each hatch cover consists of two or more panels.

單項(xiàng)選擇題

這些艙蓋通常是用電力或液壓驅(qū)動(dòng)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.

我們每航次拆卸一次吊桿。（）

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每一個(gè)艙蓋由兩個(gè)或更多的蓋板組成。（）

這些艙蓋通常是用電力或液壓驅(qū)動(dòng)的。（）

我們每航次拆卸一次吊桿。（）

每一個(gè)艙蓋由兩個(gè)或更多的蓋板組成。（）