不等式组$\left\{\begin{array}{c}3x+4\ge 4x\\ 2\left(x-1\right)+x>7\end{array}\right.$的解为____ 

假如你叫大明，收到了你的英国朋友Tony的来信，信中他很关心四川雅安地震后学生的情况。请你根据他的来信内容写一封回信，感谢他对灾区学生的关心，回答他的问题，并谈谈你的感受。
提示词语：thank you, care to， go on， government ，offer，encourage， brave　
Dear Daming,
I'm sorry to hear that a big earthquake happened in Ya'an, Sichuan. Some school buildings broke down in the earthquake and many students couldn't go to school. But I know the government is trying their best to help them. And Chinese people are so strong and brave that they aren’t afraid of anything difficult. Can the students go on studying now? Please tell me more about them.
I'm looking forward to hearing from you soon.
Yours, 
Tony
Dear Tony,
I'm glad to hear from you
Best wishes.  
Yours
Daming

如图，据保守推算，我国每年仅餐饮浪费的食物蛋白质就达800万吨，浪费脂肪300万吨，相当于两亿人一年所需。这启示我们（    ）

①我国资源紧缺，不得开发利用资源    ②应该有适度的消费，但也要注重节俭

⑧要大力发扬艰苦奋斗的精神                ④要提高思想道德素质，抵制奢靡之风