题目内容
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[主观题]
Why do the lobsters get into a long line to move（）
A．It’s a safe traveling way
B．The weather is bad
C．It is still unknown to us
D．They just don’t want not to be too crowded
提问人：网友lixin080108
发布时间：2022-01-07
题目内容
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更多“Why do the lobsters get into a…”相关的问题
第2题
why does the student mention hosting foreign-exchange students ?
A．To explain his interest in a particular field of study．
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B．To explain why he is looking for a job so late in the semester．
C．To explain why he would like to be an exchange student the following year．
D．To explain how he learned his computer skills．
第3题
Confucius led a very good life in his period, and he was envied and respected by many students.
第4题
Life being very short, and the quiet hours of it few, we ought to waste none of them in reading ___________ books.
A、valuable
B、invaluable
C、unvaluable
D、valueless
第5题
1 An accidental discovery announced recently has taken LED lighting to a new level, suggesting it could soon offer a cheaper, longer-lasting alternative to the traditional light bulb. The breakthrough adds to a growing trend that is likely to eventually make Thomas Edison&39;s bright invention obsolete. LEDs are already used in traffic lights, flashlights, and architectural lighting. They are flexible and operate less expensively than traditional lighting.
2 Michael Bowers, a graduate student2 at Vanderbilt University, was just trying to make really small quantum dots, which are crystals generally only a few nanometers big. Quantum dots contain anywhere from 100 to 1,000 electrons. They&39;re easily excited bundles of energy, and the smaller they are, the more excited they get. Each dot in Bowers&39; particular batch was exceptionally small, containing only 33 or 34 pairs of atoms.
3 When you shine a light on quantum dots or apply electricity to them, they react by producing their own light, normally a bright, vibrant color. But when Bowers shined a laser on his batch of dots, something unexpected happened. He was surprised when a white glow covered the table. The quantum dots were supposed to emit blue light, but instead they were giving off a beautiful white glow.
4 Then Bowers and another student got the idea to stir the dots into polyurethane and coat a blue LED light bulb with the mix. The lumpy bulb wasn&39;t pretty, but it produced white light similar to a regular light bulb.
5 LEDs produce twice as much light as a regular 60 watt bulb and burn for over 50,000 hours. The Department of Energy estimates LED lighting could reduce U. S. energy consumption for lighting by 29 percent by 2025. LEDs don&39;t emit heat, so they&39;re also more energy efficient. And they&39;re much harder to break.
6 Quantum dot mixtures could be painted on just about anything and electrically excited to produce a rainbow of colors, including white. The main light source of the future will almost surely not be a bulb. It might be a table, a wall, or even a fork.
Paragraph 1 ______
A LED Lighting Is Not MatureB LED Lighting Will Replace Traditional LightingC Almost Everything Could Be the Main Light Source in the FutureD LED Lighting Has Many AdvantagesE Bowers Made an Unexpected DiscoveryF LED Light Bulbs Look Lumpy
Paragraph 3 ______
A LED Lighting Is Not MatureB LED Lighting Will Replace Traditional LightingC Almost Everything Could Be the Main Light Source in the FutureD LED Lighting Has Many AdvantagesE Bowers Made an Unexpected DiscoveryF LED Light Bulbs Look Lumpy
Paragraph 5 ______
A LED Lighting Is Not MatureB LED Lighting Will Replace Traditional LightingC Almost Everything Could Be the Main Light Source in the FutureD LED Lighting Has Many AdvantagesE Bowers Made an Unexpected DiscoveryF LED Light Bulbs Look Lumpy
Paragraph 6 ______
A LED Lighting Is Not MatureB LED Lighting Will Replace Traditional LightingC Almost Everything Could Be the Main Light Source in the FutureD LED Lighting Has Many AdvantagesE Bowers Made an Unexpected DiscoveryF LED Light Bulbs Look Lumpy
Unlike traditional lighting, LEDs do not give out heat so ______.
A traditional lighting is less durable and dearerB a laser excited the quantum dotsC America adopted LEDsD graduate students work hardE quantum dot mixtures are magicF it is more efficient
Edison&39;s bright invention is likely to be outdated because ______.
A traditional lighting is less durable and dearerB a laser excited the quantum dotsC America adopted LEDsD graduate students work hardE quantum dot mixtures are magicF it is more efficient
Something unexpected happened during Bower&39;s experiment when ______.
A traditional lighting is less durable and dearerB a laser excited the quantum dotsC America adopted LEDsD graduate students work hardE quantum dot mixtures are magicF it is more efficient
Over one quarter of energy consumption for lighting could be saved by 2025 if ______.
A traditional lighting is less durable and dearerB a laser excited the quantum dotsC America adopted LEDsD graduate students work hardE quantum dot mixtures are magicF it is more efficient
第6题
In preparing its financial statements for the current year, a company's closing inventory was understated by $300,000. What will be the effect of this error if it remains uncorrected?
A、The current year's profit will be overstated and next year's profit will be understated.
B、The current year's profit will be understated but there will be no effect on next year's profit.
C、The current year's profit will be understated and next year's profit will be overstated.
D、The current year's profit will be overstated but there will be no effect on next year's profit.
