题目

  The oceans are unique to our planet. No other planet in our solar system has liquid water. The oceans cover about 70% of the earth's surface.  They contain about 97% of the earth's water supply. Life on earth originated in the seas. The oceans continue to be home to an incredible number of plants and animals.   We know very little about the oceans. Because they are so deep and dark, they are hard to study. But scientists are discovering new strange creatures all the time. We are learning more by using satellites to look at the oceans' surfaces and by using buoys (航标 ) to meas11、初中阶段是人一生中学习的黄金时期。下列警示人们珍惜学习时光的名言佳句是 ①明日复明日，明日何其多？我生待明日，万事成蹉跎 ②少壮不努力，老大徒伤悲 ③少小离家老大回，乡音无改鬓毛衰 ④知之者不如好之者，好之者不如乐之者 A．①③                 B．①②              C．②③                   D．②④