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【单选题】
An upright vessel has negative GM．GM becomes positive at the angle of loll because the ______．A.
Free surface effects are reduced due to pocketing
B.
KG is reduced as the vessel seeks the angle of loll
C.
Effective beam is increased causing BM to increase
D.
Underwater volume of the hull is increased
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【简答题】有以下程序,输入大写字母 B 后,程序运行结果是 ____ 。 #include void main( ) { char c; putchar (c= getchar ()+32); putchar ('\ n’); }