“一滴水，尚思源；一粒米，报涌泉”。2013年主流媒体推出系列的公益广告，传递了积极向上的价值理念。这些公益广告（   ）。

①体现了民族文化和时代精神的结合             

②实现了经济效益与社会效益的统一

③有助于构建先进文化，抵制落后文化           

④说明传统文化是文化创新的不竭源泉

完形填空
   A little girl went to a hospital. “I want to 1 a miracle(奇迹).” “What?” said the doctor. “My brother is badly ill, 2 my daddy says only a miracle can save my brother.” “We don’t sell miracles here, little girl. I’m 3 but I can't help you,” said the doctor. “I have the 4 to pay for it.” said the girl.
The doctor’s brother asked, “What miracle does your 5 need?” “I don't know,” she answered. “My daddy can't 6 for it, so I want to use my money.” “How much do you have?” asked the man. “A dollar and a half.” “Well,”7 the man, “a dollar and a half can buy a miracle.”
That man was a very good 8. The operation(手术) was free and her brother became well. “What's the price 9 the operation?” her mom asked. The little girl smiled. She knew exactly how 10 a miracle was—a dollar and a half with the faith(诚意) of a little girl.

已知M={a，a+d，a+2d}，N={a，aq，aq²}，a≠0，M=N，求q的值．