【语篇导读】 这是一篇说明文。文章主要介绍了电视的发展历史。
21.What can we infer about television sets in the 1960s?
A.They were very popular with Americans.
B.The reception showed no improvement.
C.They showed black-and-white pictures.
D.They were out of order now and then.
答案:A
解析:推理判断题。根据文章第二段第二句话可知,尽管早期的电视有一些缺点,但仍很受欢迎;在1950至1963年间美国家庭中拥有电视的人口从9%上升到92%。由第三段内容可排除B、C、D三项。故选A项。
22.Which of the followings did Sanford Brown fail to predict?
A.Television’s good quality.
B.The invention of 3-D TV.
C.The future office’s model
D.The potential of cable TV.
答案:B
解析:推理判断题。根据倒数第三段中“However,today’s 3D TV is even farther away,if it’s coming at all.”一句可知,Sanford Brown没有预测到3D技术在电视上的运用。故B项符合要求。
23.What is the text mainly about?
A.The shortcomings of television.
B.The bright future of television.
C.The development of television.
D.The invention of television.
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