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【单选题】
A solid disk and a ring roll down an incline. The ring is slower than the disk if
A.
m ring = m disk , where m is the inertial mass.
B.
r ring = r disk , where r is the radius.
C.
m ring = m disk and r ring = r disk .
D.
The ring is always slower regardless of the relative values of m and r .
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】程序段 int x=12; double y=3.141593; printf("%d%8.6f",x,y); 的输出结果是 ______ 。
A.
123.141593
B.
12< 空格>3.141593
C.
12,3.141593
D.
123,1415930