题型:阅读理解 题类:常考题 难易度:普通
安徽省师范大学附属中学2019届高三上学期英语期中考试试卷
Since English biologist Charles Darwin published On the Origin of Species in 1859, scientists have vastly improved their knowledge of natural history. However, a lot of information is still of the speculation, and scientists can still only make educated guesses at certain things.
One subject that they guess about is why some 400 million years ago, animals in the sea developed limbs (肢) that allowed them to move onto and live on land.
Recently, an idea that occurred to the US paleontologist (古生物学家) Alfred Romer a century ago became a hot topic once again.
Romer thought that tidal (潮汐的) pools might have led to fish gaining limbs. Sea animals would have been forced into these pools by strong tides. Then, they would have been made either to adapt to their new environment close to land or die. The fittest among them grew to accomplish the transition (过渡) from sea to land.
Romer called these earliest four-footed animals “tetrapods”. Science has always thought that this was a credible theory, but only recently has there been strong enough evidence to support it.
Hannah Byrne is an oceanographer (海洋学家) at Uppsala University in Sweden. She announced at the 2018 Ocean Sciences Meeting in Oregon, US, that by using computer software, her team had managed to link Homer's theory to places where fossil deposits (沉积物) of the earliest tetrapods were found.
According to the magazine Science, in 2014, Steven Balbus, a scientist at the University of Oxford in the UK, calculated that 400 million years ago, when the move from land to sea was achieved, tides were stronger than they are today. This is because the planet was 10 percent closer to the moon than it is now.
The creatures stranded in the pools would have been under the pressure of “survival of the fittest”, explained Mattias Green, an ocean scientist at the UK's University of Bangor. As he told Science, “After a few days in these pools, you become food or you run out of food... the fish that had large limbs had an advantage because they could flip (翻转) themselves back in the water.”
As is often the case, however, there are others who find the theory less convincing. Cambridge University's paleontologist Jennifer Clark, speaking to Nature magazine, seemed unconvinced. “It's only one of many ideas for the origin of land-based tetrapods, any or all of which may have been a part of the answer,” she said.
Embassy Suites by Hilton Sauta Ana Orange County Airport
Neighborhood: John Wayne Airport (SNA), Orange County 1325 East Dyer Road, Santa Ana, CA
OVERALL GUEST SCORE
Very Good
Based on 163 Guest Ratings
Free Breakfast Free Airport Shuttle
Fitness Center Business Center
Hotel Description
Being close to airport and freeway access makes the Embassy Suites a top choice for our guests in the area. The 300-room Embassy Suites offers homey comforts for those on business and vacation alike-suites with separate living and sleeping areas, refrigerators, microwaves, coffeemakers, Wi-Fi access and two TVs. Wake up to a free cooked-to-order breakfast and enjoy the indoor pool and fitness center. A two-hour evening reception offers drinks and appetizers and the on-site restaurant serves American favorites. The property also has a business center with copy and fax services. Parking is available for an additional fee. Less than two miles from 1-405, the Embassy Suites is within a half-mile of various restaurants and just three miles from John Wayne Airport. Our guests say the Embassy Suites' location, “brilliant” breakfast and “friendly” staff make it one of their favorite Santa Ana properties.
Guest Ratings |
Good Feb 8, 2017 By: Harold Pros: Loved the breakfast and the friendly, helpful staff. Spacious accommodations made this a very good value. Cons: Didn't love the heating/AC system; room was too cold for comfort. Also was not aware of the parking fee until we checked in. The parking fee was $ 17 a night. |
Good Jan 24, 2017 By: Micaela Pros: Breakfast was amazing with a variety of choices and the staff were helpful. Cons: The room had a very strange old smell when we first got there. I had to open the door to air it out. |
Very Good Jan 5, 2017 By: Bruce Pros: The location was very good for us and the included breakfast was a plus. CODS: The room was not cleaned properly when we got there. The heating system was not working for the hotel as well. |
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