32 Light pollution occurs whenA artificial lights illuminate the night sky.B the moon ligh

32 Light pollution occurs when

A artificial lights illuminate the night sky.

B the moon lights up the night sky.

C too many stars are visible in the night sky

D streetlights are turned off.

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更多“32 Light pollution occurs when…”相关的问题

第1题

It is an unfortunate fact of today's life that most people are growing up unable to see the stars. The prime night sky exists only in pictures. This is true not only in cities and suburbs, but also in rural areas. We have lost our view of the _____1_____ and dirtied our nighttime environment as well.

Such a loss might be acceptable if light pollution were the inevitable price of progress , as it is not. Most sky glow is unnecessary. It _____2_____ mainly from lighting sources that do little to increase nighttime safety，security or utility. They produce only glare, _____3_____ over one billion dollars annually in the U. S. alone.

For science, the impact has been even more dramatic. _____4_____ require observations of extremely faint objects that can only be made with advanced devices at sites free of air pollution and urban sky glow. For example, some images of the objects can offer information about faraway corners of the universe, _____5_____ us understand the way in which our world was actually formed, yet the light from these objects can be lost at the very end of its journey in the glare of our own sky.

Reducing light pollution is not _____6_____. It _____7_____ that public officials and citizens be aware of the problem and act to counter it. As individuals, people can help _____8_____ sky glow just by using lighting only, when necessary.

The stars above us are a _____9_____ heritage. We must _____10_____ our best to preserve it.

[A] priceless [B] stars [C] helping [D] coming [E] requires [F] comes [G] science

[H] scientists [I] did [J] do [K] easy [L] costing [M] reducing [N] difficult [O] reduce

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第2题

Light pollution threatens to prevent those wonderful sights _________being seen.A、fro

Light pollution threatens to prevent those wonderful sights _________being seen.

A、from

B、for

C、against

D、/

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第3题

Light pollution occurs when______A．artificial lights illuminate the night sky.B．the moon l

Light pollution occurs when______

A．artificial lights illuminate the night sky.

B．the moon lights up the night sky.

C．too many stars are visible in the night sky.

D．streetlights are turned off.

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第4题

听力原文： On the area weather map, most stations in southern Michigan are still reporting

sunny skies. It's seventy-nine degrees at Detroit, seventy -three degrees at Lansing. Chicago is reporting light showers. South Bend is cloudy as the cloudiness moves in from the southwest. The temperature at Ann Arbor airport in degrees Celsius is twenty -three point three. That's seventy -four degrees on the Fahrenheit scale. Sixty - six degrees is the water temperature of the lake with winds gusting at twenty knots. The relative humidity is fifty -five percent and the barometric pressure is thirty point eleven inches of mercury and falling. The pollution index today is seventy - five. The quality of our air is fair. Sunrise will be at six o'clock tomorrow morning. And now for the extended forecast for tonight, we expect partly cloudy conditions and mild temperature with tonight's about sixty degrees low and only a twenty percent chance of any showers this evening. Tomorrow morning, look for mostly cloudy conditions with a seventy percent chance of showers and thunder showers continuing into the evening. It looks like it will be a mild, but rainy weekend.

What was the report given by the weather station in Chicago？

A．Sunny skies.

B．Cloudiness, but no rain.

C．Light showers.

D．Thunderstorms.

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第5题

Air pollution is as damaging as light pollution． A．Right B．Wrong C．Not mention

Air pollution is as damaging as light pollution．

A．Right

B．Wrong

C．Not mentioned