单选题When a crankshaft （） outside the engine, it should be carefully supported in a manner which will avoid imposing high bending moments on it.Ahas to be handledBmay be handledChas being handledDwill be handling
单选题
When a crankshaft （） outside the engine, it should be carefully supported in a manner which will avoid imposing high bending moments on it.
A
has to be handled
B
may be handled
C
has being handled
D
will be handling
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