Many people think it is very exciting and admirable(令人羡慕的) to be an actor. The actors often wear the most beautiful and fashionable clothes and they can make a lot of money. Many people like them and they have so many fans. But in fact, the job of an actor can be very tiring and hard. To make good movies, for example, action movies, the actors need to go to some remote(偏远的) places. There they don't have good places to stay or nice food to eat. They often have to get up early and go to bed very late. When they are too busy, they don’t have time to sleep or relax. It's very hard.

读“某型飞机生产网络图”，分析其中信息，可看出（　　）

用全面的眼光认识自己，应该做到（    ）

①既要认识自己的外在形象，又要认识自己的内在素质  ②既要看到自己的优点，又要看到自己的缺点

③既要看到过去、现在的你，又要看到将来的你              ④不断改正缺点来完善自己

下列各物质在氧气中燃烧时，能生成黑色固体物质的是   （     ）