下列哪项不属于生物防治（　　）

Different countries have different customs. When you travel to another countries，please follow their customs，just as the saying goes，“             .”Very often people who travel to the United States forget to tip（付小费）.It is usual to tip porters who help carry your bags，taxi drivers and waiters. Waiters expect to get a 15% tip on the cost of your meal. Taxi drivers expect about the same amount.
In England，make sure to stand in line even if there are only two of you. It's important to respect lines there. It’s a good idea to talk about the weather. It's a favorite subject of conversation with the British.
   In Spain，it's a good idea to have a light meal in the afternoon if someone invites you for dinner. People have dinner very late，and restaurants do not generally open until after 9 pm.
   In Arab countries，men kiss one another on the cheek（脸颊）. Your host may welcome you with a kiss on both cheeks. It is polite for you to do the same.
   In Japan，people usually give personal or business cards to each other when they meet for the first time. When a person gives you a card，don't put it into your pocket right away. The person expects you to read it.Don't forget to be careful of your body language to express something In conversation. A kind of body language that is acceptable in one culture may be impolite in another.

天津市对1500名中小学生进行了调查，52%的学生每天由家长代为整理学习生活用品，79%的学生离开家长束手无策，只有3%的学生能做些家务。这个数据提示我们（    ）

①我国的孩子很幸福                                                    ②人生需自立，我们要事事自主

③我国的父母们不注重孩子的自立能力的培养        ④这样的依赖会使人丧失独立生活的能力和精神，缺乏生活的责任感

***在社会主义建设过程中对科学社会主义理论做出了重大贡献。新中国成立后，第一次比较系统地回答了中国社会主义现代化建设的一系列问题的理论是（    ）