题目内容
（请给出正确答案）
Holonyak believed that LEDs would become very popular in the future.
A．Right
B．Wrong
C．Not mentioned
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A．Right
B．Wrong
C．Not mentioned
A．No one believed radio broadcast.
B．Jokes on the radio was prohibited.
C．A panic and the deaths of some people.
D．Many people feared radios.
The writer's father believed that ______.
A．you should only do things for which you have the ability
B．only important jobs are worth doing well
C．you should only attempt worthwhile jobs
D．anything you do should be done to your best ability
Our cyclone separator is operating with Dcut=5μ. It is now necessary to increase the flow rate to the cyclone (and hence the inlet velocity) by 25 percent (i.e., the new velocity will be 1.25 times the old velocity). Nothing else will change. The cyclone is believed to obey Eq. (9.18). Estimate the new cut diameter.
Why did people in the 1920s and 30s like to have something named with science？
A．Because they felt science could offer predictability and reliability.
B．Because science was very catchy and appealing to both Christians as well as non-Christians.
C．Because people believed that the science of religion was in fact the science of mind.
D．Because people wanted to let these two fields penetrate and complement each other.
Inventor of LED
When Nick Holonyak set out to create a new kind of visible lighting using semiconductor alloys, his colleagues thought he was unrealistic. Today, his discovery of light-emitting diodes, or LEDs, are used in everything from DVDs to alarm clocks to airports. Dozens of his students have continued his work, developing lighting used in traffic lights and other everyday technology.
On April 23, 2004, Holonyak received the $ 500,000 Lemelson-MIT Prize at a ceremony in Washington. This marks the 10th year that the Lemelson-MIT Program at the Massachusetts Institute of Technology (MIT) has given the award to prominent inventors. "Anytime you get an award, big or little, it's always a surprise. " Holonyak said.
Holonyak, 75, was a student of John Bardeen, an inventor of the transistor, in the early 1950s. After graduate school, Holonyak worked at Bell Labs. He later went to General Electric, where he invented a switch now widely used in house dimmer switches. Later, Holonyak started looking into how semiconductors could be used to generate light. But while his colleagues were looking at how to generate invisible light, he wanted to generate visible light. The LEDs he invented in 1962 now last about 10 times longer than incandescent bulbs, and are more environmentally friendly and cost effective.
Holonyak, now a professor of electrical and computer engineering and physics at the University of Illinois, said he suspected that LEDs would become as commonplace as they are today, but didn't realize how many uses they would have.
"You don't know in the beginning. You think you're doing something important, you think it's worth doing, but you really can't tell what the big payoff is going to be, and when, and how. You just don't know. " he said.
The Lemelson-MIT Program also recognized Edith Flanigen, 75, with the $100,000 Lemelson-MIT Lifetime Achievement Award for her work on a new generation of "molecular sieves," that can separate molecules by size.
Holonyak's colleagues thought he would fail in his research on LEDs at the time when he started it.
A．Right
B．Wrong
C．Not mentioned
Holonyak said that you should not do anything you are not interested in.
A．Right
B．Wrong
C．Not mentioned
Holonyak was the inventor of the transistor in the early 1950s.
A．Right
B．Wrong
C．Not mentioned
SECTION B PASSAGES
Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.
听力原文： The belief that four-leaf clovers are good luck comes from the Druids, ancient residents of the British Isles. Several times a year, they gathered in oak groves to settle legal disputes and offer sacrifices. Then they ended their rituals by hunting for four-leaf clovers. Why？ They believed a four-leaf clover enabled its owner to see evil spirits and witches, and therefore avoid them. Ancient people believed spirits living in springs and fountains demanded a tribute--usually flesh. Young Mayan girls, for example, were sometimes tossed into the Well of Sacrifice (where they would "marry" the spirits). Today, we just throw the spirits a penny or two for luck. In the Middle Ages, churchmen insisted that knocking on wood was part of the tradition of prayer, since Christ was crucified on a wooden cross. They were right hut the tradition started several thousands of years earlier, with a different deity. Both Native Americans and ancient Greeks developed the belief (independently) that oak trees were the domains of an important god. By knocking on an oak, they were communicating with him and asking for his forgiveness. The Greeks passed their tradition on to the Romans, and it became part of European lore. The oak's "power" was eventually transferred to all wood.
According to the lecturer, what did people used to throw into wells？
A．Coins.
B．Food.
C．Flowers.
D．People.
Holonyak said that you should not do anything you are not interested in.
A．Right
B．Wrong
C．Not mentioned
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