A:fights
B:fight
C:to fight
D:fighting
已知定义在R上的函数fx,gx满足fxgx=ax,且f'xgx<fxg'x f1g1+f-1g-1=52,若有穷数列fngn(n∈N*)的前n项和等于3132,则n等于( )
已知一组数据的频率为0.35,数据总数为500个,则这组数据的频数为 ____.
根据句意及首字母提示完成句子
1. Thirty m____ is half an hour.
2. One k____ is 1000 meters(米).
3. Mary wants to buy a n____computer. Her old one is broken(坏的).
4. He gets up early e____ morning.
5. -How do you get to work, Emma?
-I get to work b____ bike.