Ever wonder how much a cloud weighs? What about a hurricane? A meteorologist(氣象學(xué)者) has done some estimates and the results might surprise you.
Let's start with a very simple white puffy cloud — a cumulus cloud（積云）. How much does the water in a cumulus cloud weigh? Peggy LeMone, senior scientist at the National Center for Atmospheric Research in Boulder, Colorado, did the numbers. "The water in the little cloud weighs about 550 tons," she calculates. "Or if you want to convert it to something that might be a little more meaningful … think of elephants."
The thought of a hundred elephants-worth of water suspended(懸浮的) in the sky begs another question — what keeps it up there?
"First of all, the water isn't in elephant-sized particles（微粒）, it's in tiny tiny tiny particles," explains LeMone. And those particles float on the warmer air that's rising below. But still, the concept of so much water floating in the sky was surprising even to a meteorologist like LeMone. "I had no idea how much a cloud would weigh, actually, when I started the calculations," she says.
So how many elephant units of water are inside a big storm cloud—10 times bigger all the way around than the "puffy" cumulus cloud? Again, LeMone did the numbers: About 200,000 elephants.
Now, ratchet up(略微調(diào)高) the calculations for a hurricane about the size of Missouri and the figures get really massive(巨大的). "What we're doing is weighing the water in one cubic meter theoretically pulled from a cloud and then multiplying by(乘上) the number of meters in a whole hurricane," she explains.
The result? Forty million elephants. That means the water in one hurricane weighs more than all the elephants on the planet. Perhaps even more than all the elephants that have ever lived on the planet.
【小題1】The weight of is NOT mentioned in the passage.
| A．a(chǎn) cumulus cloud | B．a(chǎn) tornado |
| C．a(chǎn) hurricane | D．a(chǎn) storm cloud |
| A．She found it not convincing. |
| B．She thought it needed further calculations. |
| C．She was quite surprised at it. |
| D．She considered the calculations inaccurate. |
| A．A storm cloud weighs about 200,000 elephants. |
| B．The water in a hurricane weighs more than that in any other kind of cloud. |
| C．There are less than forty million elephants living on the earth. |
| D．The water in the cloud is in very tiny partials. |
| A．How Much a Cloud Weighs | B．How Much a Hurricane Weighs |
| C．Surprising Results | D．Elephants in the Sky |
【小題1】B
【小題2】C
【小題3】C
【小題4】D
解析試題分析：本文是一篇說(shuō)明文，說(shuō)明了氣象學(xué)專家對(duì)以多云和颶風(fēng)、一朵積云重量進(jìn)行測(cè)試，測(cè)量結(jié)果令人吃驚。
【小題1】細(xì)節(jié)題，由第一段第一行Ever wonder how much a cloud weighs? What about a hurricane和第二段第一行a cumulus cloud可以知道a tornado沒(méi)有被提到，故選B。
【小題2】細(xì)節(jié)題，由第一段最后一句A meteorologist has done some estimates and the results might surprise you.可以知道Peggy LeMone對(duì)這個(gè)結(jié)果很驚訝，所以選C。
【小題3】細(xì)節(jié)題，由最后一段最后一句Perhaps even more than all the elephants that have ever lived on the planet可以知道地球上的大象不到4千萬(wàn)，所以選C
【小題4】主旨題：氣象學(xué)專家對(duì)云重量進(jìn)行測(cè)試，把云的數(shù)量和地上的大象進(jìn)行比較，就是把天上的云看成大象的重量，選D
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| A．health | B．long life | C．a(chǎn)geing | D．effect |
| A．men’s heart cells | B．women’s ageing process |
| C．the gender difference | D．hearts and long life |
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| B．women can replace the cells that enable the heart to beat |
| C．the female heart loses few of the cells with age |
| D．women never lose their pumping power with age |
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【小題1】What tends to give rise to the highest death toll according to the passage?
| A．The lack of tight environmental protection standards. |
| B．The increasing numbers of the diesel cars and trucks. |
| C．The frighteningly high death rate from deadly cancer. |
| D．The world’s serious air pollution such as soot and dust. |
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| A．the diesel soot is too small to be seen |
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| C．the diesel soot roots in lungs and gets into blood |
| D．the diesel soot can also contribute to deadly cancer |
| A．the global economic growth is mainly to blame for air pollution and climate change |
| B．the developing countries are repeating the same mistakes as the developed ones made |
| C．the ecological situation and air pollution in India are becoming worse and worse |
| D．the unbeatable air is increasingly becoming a major killer throughout the world |
| A．the making of tougher environmental regulations alone is of little use |
| B．more sever regulations should be made to handle air pollution |
| C．the urban construction in western developed countries is the best choice |
| D．the pace of development has to be slowed down to reduce air pollution |
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| A．to test the safety of the concept car |
| B．to follow the rules in the car industry |
| C．to show their unique idea of complete freedom |
| D．to see if concept cars can be massively produced |
| A．Concept Cars Are Driving to the Future |
| B．The@Ant Draws a Lot of Attention |
| C．The@Ant Is a Top Model of Concept Cars |
| D．Concept Cars Are Cleaner and Greener |
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【小題1】What can we learn about piranhas from the passage?
| A．Piranhas are the most dangerous animals. |
| B．Piranhas like to live in the deep seabed. |
| C．Piranhas may attack human beings when the water level is low. |
| D．Piranhas only attack human beings when they cross the river in groups. |
| A．It often uses its poison to kill its victim. |
| B．It often uses its strength to kill its victim. |
| C．It kills its victim mainly using its powerful teeth. |
| D．It kills its victim with the help of other snakes. |
| A．hide itself by appearing like the surroundings |
| B．terrify and capture the enemy by making much noise |
| C．move around to search for delicious food |
| D．give off harmful gas to kill the targets |
| A．no animals can survive the poison of the golden poison frog |
| B．they like to wander along the path of the golden poison frog |
| C．the golden poison frog likes eating them most |
| D．the poison of the golden poison frog is deadly |
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