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【单选题】
分析下列定义的类，在main函数中输出的结果是 class Fu { int i = 5; } class Zi extends Fu { int j = 2; } public class Demo { public static void main(String[] args){ Fu f = new Fu(); Zi z = new Zi(); System.out.println(f.i+","+z.i); }A.
0,0
B.
5,5
C.
5,2
D.
2,2
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【单选题】Jason failed one of the exams, but we should make ________ for the fact that he had been ill and absent from class for a whole year.
A.
permit
B.
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A.
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B.
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C.
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D.
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【简答题】如图所示,A与B两飞轮的轴杆可由摩擦齿合器使之连接,A轮的转动惯量为10 。开始时轮静止,A轮以600转/分的速度转动,然后使与B连接,因此B轮得到加速而A轮减速,直到两轮的转速都等于200转/分为止。则B轮的转动惯量为 。
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