2019学年度外研版选修七Module2Highlights of my senior yearlPeriod1Reading阅读学案

第一节阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。

　　　　　　　　　　　　　　　　　　A

The research ship，Atlantis，pulled out of the port of St. George in Bermuda recently and headed off to sea in search of a mountain. Scientists from eight universities will spend a month aboard the ship searching for clues to a mystery. Their basic question: why has a high mountain risen from the ridges (山脊) and hills along a fascinating geological structure called the Mid­Atlantic Ridge? Far beneath the surface of the ocean，the 12，000­foot Atlantis Massif is nearly twice as tall as other mountains in the area，and no one is certain why.

The Mid­Atlantic Ridge has long fascinated scientists，because it is one of the regions on the Earth-all located underwater-where new crust (地壳) is formed. As the Earth's tectonic plates (地质构造板块) pull apart at the ridge，hot rocks from below rise to the surface and cool into stone. Many centuries from now，the forces of nature will use some of those rocks to build new mountains along the shorelines，constantly reforming the planet that we call home. The ridge itself is enormous，winding south from Iceland for more than 6，000 miles，and it is one of the largest mountain ranges on the Earth. But it is completely underwater，usually at least 12，000 feet deep，except for the few areas where mountains poke (伸出) through the surface.

However，most of the mountains along the ridge are relatively modest in size. That was why Donna Blackman of the Scripps Institution of Oceanography in California，was so surprised when she and Joe Cann of the University of Leeds in the United Kingdom discovered the Atlantis Massif while mapping the ridge a few years ago.

Mountains are common mid­ocean ridges，but this one is a dandy. It is four to six times wider than other mountains in the area and it towers over its neighbors like a mountain.

Blackman wanted to know how it got there and why it was so big. She is the chief scientist on the expedition. Co­principal investigators are Deborah Kelly of the University of Washington，an expert on the interaction (相互作用) of fluids with oceanic rock，and Jeffrey Karson，a structural geologist at Duke University.

21．The scientists aboard the ship intend to ________．

A．collect information about the Atlantis Massif

B．explore the mysterious underwater world

C．study the geological structure of Bermuda

D．look for the Mid­Atlantic Ridge

22．The second paragraph is mainly about ________．

A．the history of the Mid­Atlantic Ridge

B．the landscape of the Mid­Atlantic Ridge

C．unusual things about the Mid­Atlantic Ridge

D．the mountains along the Mid­Atlantic Ridge

23．We can learn from the text that ________．

A．Donna Blackman is a geologist from Britain