***说过，我们共产党内能有100多到200人真正学通了哲学，那么我们就能够打败帝国主义。***这一观点，我们应当这样理解
①哲学是一门给人智慧、使人聪明的学问
②哲学是系统化理论化的世界观
③哲学能指导人们正确地认识世界和改造世界
④哲学源于人们对实践的追问和对世界的思考

南通市某天上午的温度是8℃，中午又上升了5℃，下午由于冷空气南下，到夜间又下降了7℃，则这天夜间的温度是____℃．

根据短文内容, 回答下列问题。
    Lin Hai is thirteen. He's a student in a school in Tianjin. He gets an e-mail from Tom White. Tom is a student in the USA. Here is the e-mail.
Dear Lin Hai,  
    My name is Tom White. I am from New York, USA. I am fourteen years old. I'm a schoolboy. I want to make some friends in China.
    There are eleven boys and nine girls in my class. We come from different countries—Japan, the USA, the UK and Canada. But at school we all speak English. My parents are from France (法国). They speak French and English, so I can speak English and French well. But I want to learn Chinese. Can you help me? There are many Chinese people in New York and I want to talk with them.
I can play chess well, and I can play many sports. How about you?
Please write to me soon.
Yours,  
Tom

2017年5月5日，中国首架无人机C919客机在浦东机场首飞成功．回答下列问题：

1919年3月，英国首相劳合·乔治说：“你们可以把德国的殖民地夺走，把它的军队减到仅够警察的力量，把它的海军减到五等国家的地位，但结果还是平等的，如果德国认为1919年的和约不公平，它将会对战胜国进行报复”这段材料说明（    ）

①英国反对缔结处置德国的和约

②劳合·乔治预感到德国复仇主义者的威胁

③英国认为《凡尔赛和约》是不公正的

④《凡尔赛和约》将导致战胜国和战败国的矛盾激化