A crankshaft whose center of gravity coincides with its center line is said to be（） Ⅰ.statically balanced Ⅱ.dynamically balanced<br>A:Ⅰ only<br>B:Ⅱ only<br>C:both Ⅰ and Ⅱ<br>D:neither Ⅰ nor Ⅱ

A crankshaft whose center of gravity coincides with its center line is said to be（） Ⅰ.statically balanced Ⅱ.dynamically balanced
A:Ⅰ only
B:Ⅱ only
C:both Ⅰ and Ⅱ
D:neither Ⅰ nor Ⅱ

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