考博考试

【单选题】The coastlines on the two sides of theAtlantic Ocean present a notable parallelism: the easternmost region ofBrazil, in Pernambuco, has a convexity that corresponds almost perfectly with the concavity of theAfrican Gulf of Guinea, while the contours of theAfrican coastline between Rio de Oro and Liberia would, by the same approximation, match those of theCaribbean Se
A、
Similar correspondences are also observed in many other regions of the earth. This observation began to awaken scientific interest about sixty years ago, whenAlfred Wegener, a professor at the University of Hamburg, used it as a basis for formulating a revolutionary theory in geological science.According to Wegener, there was originally only one continent or landmass, which he called Pange
A、Inasmuch as continental masses are lighter than tile base on which they rest, he reasoned, they must float on the substratum of igneous rock, known as sima, as ice floes float on the se
A、Then why, he asked, might continents not be subject to drifting The rotation of the globe and other forces, he thought, had caused the cracking and, finally, the breaking apart of the original Pangea, along an extensive line represented today by the longitudinal submerged mountain range in the center of theAtlanti
C、WhileAfrica seems to have remained static, theAmericas apparently drifted toward the west until they reached their present position after more than 100 million years.Although the phenomenon seems fantastic, accustomed as we are to the concept of the rigidity and immobility of the continents, on the basis of the distance that separates them it is possible to calculate that the continental drift would have been no greater than two inches per year.
The submerged mountain range in theAtlantic ______.
A、runs from east to west

B、runs from north to south

C、is proof of Professor Wegener’s theory
D．is made up of igneous rock

网考网参考答案：B
网考网解析：
大西洋中被淹没的山脉自北向南延伸。根据第二段中的短语 longitudinal submerged mountain range in the center of the Atlantic可选准正确答案。 longitudinal的意思是“经度的、纵向的”，“纵向”指自北向南的方向。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>