写出涂色部分角的角度.
____
在△ABC中,a=3, b=5 ,A=60°,则cosB=( )
It's moving to see so many strangers can care for each other, ____ ____?
What is the best way you think of ______ the environment?
妈妈买回来8个大苹果给小丽吃,如果每天至少要吃掉3个苹果,最多可以有____ 种不同的吃法.