Holonyak was the inventor of the transistor in the-福建自考网

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卷面总分：100分试卷年份：2023.04 是否有答案：有作答时间： 120分钟

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A、True
B、False
C、Not Given

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LEDs are more environmentally friendly than incandescent bulbs.

A、True
B、False
C、Not Given

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Cell Phones:Hang Up or Keep Talking?
Millions of people are using cell phones today. In many places it is actually considered 41 (usual)not to use one. They find that the phones are more than a means of__42(communicate)—having a mobile phone shows that they are cool and43_(connect).
The__44 (explode)around the world in mobile phone use make some health professional
worried.Some doctors are45(concern)that in the future many people may suffer health problems from the use of mobile phones. In England, there has been a serious debate about this issue. Mobile phone companies are worried about the negative 46 (public)of such ideas.They say that there is no47(prove)that mobile phones are bad for your health.
On the other hand, signs of change in the issues of the brain and head can be48_(detect) with modern scanning equipment. What is it that makes mobile phones49(potential)harmful? The answer is radiation.
As the discussion about their safety continues, it appears that it's best to use mobile phones less often. Use your regular phone if you want to talk for a long time.Use your mobile phone only when you really need it. Mobile phones can be very useful and convenient, especially in emergencies.In the future, mobile phones may have a50 (warn)label that says they are bad for your health.So for now, it's wise not to use your mobile phone too often.

According to the passage, which aspect of skyscrapers were some residents of North America concerned with in the late 1960's?

A、The poor reception of radio and TV signals.
B、The removal of trees and grass from building sites.
C、The harmful effects on the city's plans.
D、The obstruction of air traffic

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Holonyak was the inventor of the transistor in the early 1950s

更多题目请在下方输入框内输入要搜索的题目：

LEDs are more environmentally friendly than incandescent bulbs.

According to the passage, which aspect of skyscrapers were some residents of North America concerned with in the late 1960's?

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答题卡

Holonyak was the inventor of the transistor in the early 1950s

更多题目 请在 下方输入框 内输入要搜索的题目：

LEDs are more environmentally friendly than incandescent bulbs.

According to the passage, which aspect of skyscrapers were some residents of North America concerned with in the late 1960's?

更多题目请在下方输入框内输入要搜索的题目：