单项选择题

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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单项选择题
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
单项选择题
The flood stream here is at an average rate of 0.8（）.

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