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單項(xiàng)選擇題

The joint formed when two steel plates are placed end-to-end is called a（）.

A.bevel
B.seam
C.butt
D.bond

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單項(xiàng)選擇題

The inner bottom is the（）.

A.tank top
B.compartment between the tank top and shell of the vessel
C.inner side of the vessel's shell
D.space between two transverse bottom frames

單項(xiàng)選擇題

The flood stream here is at an average rate of 0.8（）.

A.cables
B.miles
C.kilometers
D.knot