阅读下列材料，并结合所学知识回答问题。
材料一  1947年3月12日，杜鲁门在国会发表演说，宣称美国有领导“自由世界”的使命，以“防止共产主义的渗入”。
——人教版《世界历史》（九年级·下册）
材料二 当1945年同盟国击败轴心国，摧毁德意志帝国和日本帝国时，随着另一场战争的开始，世界不行不重复。
——美国历史学家杰里·本特利
材料三 冷战消失了……为具有更加多元化特点的社会开启了大门。
——人教版《世界历史》（九年级·下册）

下列说法,错误的是:

那么，“我和他是同学”的数字信号为“0，01，1，10，00”，请照此代码用另一组信号表达你想说的一句话____．数字信号为：____．

读图并回答问题。

    Five years ago I was working in an office. My life was all about dealing with complaints, meeting deadlines and writing reports. I wasn't completely bored 1it didn't excite me. One 2I went out to buy a sandwich. It was sunny and I wasn't 3at work, so I decided to 4 it in the park. I could see a group of people 5a TV programme nearby. They seemed to be arguing about something and everybody looked very6 .

    Suddenly I realized everyone was 7me. And then two of them started walking over---towards me! They   8that they were making a short film and one of their actors hadn't 9 . He only had one line in the story, they said. Would I mind 10  the line?

    I could tell they were desperate and although I'd never done any acting in my life, for some reason I  11.

    An hour later we finished. It was really an amazing experience. The people were very 12 and paid me for my time. However, 13 I was leaving, the director of the film came over and 14 me his card. He thought I'd been brilliant and was naturally talented as a(n)15 I laughed but16 to call him some time.

    Well, I did call him. I went for an audition(试演)for another short film with the director. And I got the 17 . Two years later I 18  my office job and I'm now working almost full-time as an actor. I love the work and I'm going back to college next year to study 19 . My life is now completely20, all because of that lunch in the park.