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 cloudB．a(chǎn) tornado
C．a(chǎn) hurricaneD．a(chǎn) storm cloud
小題2:How did Peggy LeMone feel about the result of her calculations?
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.
小題3:What can be inferred from the passage?
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.
小題4:What is the best title for the passage?
A．How Much a Cloud WeighsB．How Much a Hurricane Weighs
C．Surprising ResultsD．Elephants in the Sky

小題1:B
小題2:C
小題3:C
小題4:D

試題分析：本文是一篇說(shuō)明文，說(shuō)明了氣象學(xué)專(zhuān)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(zhuān)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．people have found that some luxury goods are fakes
B．people can buy luxury goods at a low price on eBay
C．luxury brands will give up high-end images
D．consumers prefer brand names to discounts
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