高考培訓(xùn)
高考培訓(xùn)
互動封閉仿真課堂
1、智能交互 2、電子板書式視頻教學(xué) 3、在線互動問答 4、封閉課堂啟發(fā)式教學(xué)方式
隨堂測試、知識梳理、易錯點揭示、總結(jié)啟迪智能錯題本
聽課中的錯題能自動加入錯題本，課后可方便復(fù)習(xí)及導(dǎo)出錯題本升級服務(wù)
在線答疑、課后同類題練習(xí)、講義下載、短信提醒The Atlantic Ocean is the second largest ocean in the world, covering about 20 percent of the earth's surface. It separates Europe and Africa to the east from North and South America to the west. Its name, which comes from the Greek, probably refers to Atlantis, the legendary island continent said to have been the site of a great civilization before the island suddenly disappeared.
The Atlantic extends from the Arctic Ocean in the north to Antarctica in the south. It is over 16, 000 kilometers long and between 2, 900 kilometers and 8, 500 kilometers wide. The area of the Atlantic is about 106, 464, 000 square kilometers. Its average depth is around 3, 300 meters, and the maximum depth is 8, 380 meters in the Puerto Rico Trench, north of the island of Puerto Rico.
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