综合性学习。

为了更加深入地了解诺贝尔奖，九年级(2)班准备出一期题为“诺贝尔奖与我们”的专题板报，板报设立三个栏目。请你完成以下任务。

补全下列单词。

①p____ddles    

②n____mber   

③neighborh____ ____d    

④sl____pp____ry   

⑤____ff____cial   

  ⑥c____mp____titor  

⑦m____ ____nt____ ____n        

  ⑧h____lm____t   

⑨c____mp____tition

若不等式组 $\{\begin{array}{c}x+a\ge 0\\ 1-2x>x-2\end{array}$ 有解，则a的取值范围是 ____．

  Tom: Hello! Do you go to school every day?

  Kate: No, we go to school from Monday to Friday.

  Tom: What are you going to do this Sunday?

  Kate: I am going to swim.

  Tom: What about your brother, John?

  Kate: No, he is going to fly a kite.

  Tom: Where is he now?

  Kate: He is at home. He is making a kite.

  Tom: Can I go and see him?

   Kate: Sure. Let's go.

小奇同学在进行研究性学习时搜集了“焚书坑儒”、“罢黜百家，独尊儒术”、“文字狱”等相关资料，由此推测他研究的课题最有可能是（    ）