著名经济学大师萨缪尔森说:“市场经济的最终两个主宰是消费者与技术。”这是因为( )①能否满足市场需求是商品价值能否实现的前提 ②需求引导生产,有什么需求才能生产什么③科技创新是提高产品质量和劳动生产率的关键④产品技术水平的高低决定其市场占有率的高低
Our teacher’s plans are still ____________.
In our school, the students have three__________ courses and seven __________courses.
Being able to speak another language fluently could be a great ___when you are looking for a job.
It doesn’t often snow in my hometown in winter, but it ___be rather cold sometimes.
His first baby was born soon after he got married, which seemed to have ___his sense of responsibility.