The CEO from the big company believed that it was the newcomers' ability ____,not the university they graduated from.(difference)
若a→=(3,-1),b→=(-3,2),则a→·b→=____
— Sorry, but I have something important to tell you.
①理想信念对实现人生梦想具有决定性作用
②在脚踏实地中放飞人生梦想
③人生梦想应该与国家民族的命运紧密相连
④人生梦想的实现在于自我满足