Unit 7 The Sea
Period One Warmup & Lesson 1 The Spirit of Explorers
Ⅰ.阅读理解
A
Under the world’s oceans and seas lies an attracting world of lands that stretches hundreds of kilometers in every direction.In this world，without the sun，there are deep canyons (峡谷)，great plains，and towering ranges of mountains.And this underwater world covers 70 percent of the earth’s surface.
The world’s longest mountain range extends 16,000 kilometers under the Atlantic Ocean from Iceland to the Antarctic.Called the MidAtlantic Ridge (山脊)，this range of mountains contains a number of high peaks，among them are the Ascension Island，the Azores，and Iceland.
