What happens to most meteoroids coming into the atmosphere?-考呗网

公共英语二级

单选题 What happens to most meteoroids coming into the atmosphere?

A．They burn up．
B．They fall to earth．
C．They explode．
D．The float in the air．

推理题。题干意为“大部分流星在穿过大气层时会发生什么?”由文章第一段可知，那时它们的速度如此之快以至于它们开始燃烧，你所能看到的只是一道光划过天空，然后消失不见。由此推出，流星穿过大气层时会燃烧，故A正确。

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1 The word“meteorites”(Line 1，Para．3)refers to pieces of rock that__________．

A．move fast in outer space
B．have been found at a tourist centre
C．flash through space at a high speed
D．have fallen onto the Earth from space

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2 根据下面资料，回答题。
Pack your bags．Hold the mail．It’s time to turn your dream vacation into a real trip．“I haven’t seen a buyer’s market like this in 25 years．”says travel expert Peter Greenberg．“Every-thing is on sale．Even the high end of the market is quietly offering add-ons：a free night here，a spa(水疗)pass there．”
In a bad economy，this comes as good news for many．Whether you want to fly across the country or drive across the state line，here are places that offer plenty to do．
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Chicago，lllinois：One of America’s best-looking city centers，especially in the spring and summer．Spend a sunny day in Millennium Park，or consider an evening at Grant Achatz’s Alinea restaurant in Lincoln Park．
Las Vegas，Nevada：It’s never been so easy to score a deal on the strip．Five-star hotels are marked down to three-star prices．Book a luxury suite(豪华套房)for$89 a night at www．trum-plasvegashotel.com．
San Francisco，California：It’s rare for a major city to have such an extraordinary physical setting—the views of the bay(海湾)from the hills and the Ferry Building Marketplace are striking．
It’s also a walkable city with great museums．You can visit the new California Academy of Sci-ences building in Golden Gate Park．Go early!
Portland，Oregon：The International Rose Test Garden is the one place one never tires of vis-iting．It’s green，friendly，and laid-back．There are over 10，000 rosebushes，and because it’s a test garden，the public has never seen many of these 550 varieties．The Rose Festival is one of the biggest celebrations in the city and runs May 22 to June 14．
Why is it the best time for traveling now?

A．People have more free time．
B．Everything is at lower prices．
C．The weather is more pleasant．
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3 What does the word“add-ons”(Line 3，Para．1)most probably mean?

A．Major sales．
B．Extra services．
C．Paid holidays．
D．Additional payments．

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