Question

【題目】根據(jù)短文理解，選擇正確答案。
Ever wonder how much a cloud weighs? What about a hurricane? A meteorologist（氣象學(xué)家） 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.” Assume（假設(shè)） an elephant weighs about six tons, she says, that would mean the water inside a typical cumulus cloud would weigh about one hundred elephants.
The thought of a hundred elephants' worth of water floating 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（計算）,” 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, come to the calculations for a hurricane about the size of Missouri and the figures get really massive. “What we're doing is weighing the water in one cubic meter theoretically pulled from a cloud and then multiplying by 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.
（1）The weight of ________ is NOT mentioned in the passage.
A.a cumulus cloud
B.a storm cloud
C.a hurricane
D.a tornado
（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 considered the calculations inaccurate.
D.She was quite surprised at it.
（3）What can be inferred from the passage?
A.A storm cloud weights about 200,000 elephants.
B.The water in the cloud is in very tiny particles.
C.There are less than forty million elephants living on the earth.
D.The water in a hurricane weights more than that in any other kind of cloud.
（4）What is the best title for the passage?
A.Surprising Results
B.Elephants in the Sky
C.How Much a Cloud Weighs
D.How Much a Hurricane Weighs

Answer 1

【答案】
（1）D
（2）D
（3）C
（4）B
【解析】本文是一篇說明文，介紹了氣象學(xué)專家對積雨云和颶風(fēng)的重量進(jìn)行了測量，測量結(jié)果令人吃驚。

⑴考查細(xì)節(jié)理解。根據(jù)第一段中的“Ever wonder how much a cloud weighs? What about a hurricane？”；第二段中的“a cumulus cloud”以及第五段中的“a big storm cloud”可知，a tornado沒有被提到，故選D。

⑵考查推理判斷。根據(jù)第一段中的“A meteorologist has done some estimates and the results might surprise you.”可知，Peggy LeMone對這個結(jié)果很驚訝，故選D。

⑶考查推理判斷。根據(jù)最后一段中的“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.”可知，地球上的大象不到4千萬，故選C。

⑷考查主旨大意。氣象學(xué)專家對云的重量進(jìn)行了測試，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，以用來稱重，B項(xiàng)能概括文意又能吸引讀者，適合作為標(biāo)題，故選B。