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【单选题】
The static ally determinate beam with centralhinge is shown in the figure. If the concentrated couple M is moved from the right side of the hinge C to the left side,.A.
the Q diagram of the beam remains unchanged and the M diagram changes
B.
the M diagram of the beam remains unchanged and the Q diagram changes
C.
both the Q and M diagrams are changed
D.
both the Q and M diagrams are unchanged
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A.
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