55>89
56>36
36=12.
故答案为:>,>,=.
如图所示,一个大轮通过皮带拉着一个小轮转动,假设皮带和两轮之间没有打滑,而且R1=2R2,C为R1的中点,那么:
(1)=____________;
(2)____________;
(3)=____________。
The radiotelephone safety message urgently concerned with safety of a person would be prefixed by the word().
A.Mayday
B.Pan
C.Safety
D.Interco