如图所示，甲、乙、丙三个轮子依靠摩擦传动，相互之间不打滑，其半径分别为r₁、r₂、r₃．若甲轮的角速度为ω₁，则丙轮的角速度为（   ）

①____②____③____④____⑤____。

                                                                                钟山①即事②
                                                                                                                          宋•王安石
                                                                                        涧水无声绕竹流，竹西花草弄春柔。
                                                                                        茅檐相对③坐终日，一鸟不鸣山更幽。
［注释］①钟山：山名。②即事：有感于当前事物的诗，常被冠以“即事”之类的题目。③相对：对着山。

“Here is a new coat for you. __________ .” My mother said.