高考【概要写作话题训练7】地球探索 共21张PPT

【概要写作话题训练7】 地球探索 人与环境 主题语境:地球探索关键词: finding chemicals语篇类型:事理阐释短文词数:371语篇难度:★★★建议时间:24mins 阅读下面短文,根据其内容写一篇60词左右的内容概要 Sharks aren 't the scariest things in the ocean for scientists who dive to work Powerful currents created here the ocean floor drops away can be just as deadly. You can get sucked down and crushed by the pressure within minutes, "notes Marcel Jaspars. He's a chemist who once saved himself from such a current. he encountered it while taking photos of a sea sponge near Indonesia, in Southeast Asia. Luckily, he inflated his dive vest in time. He was able to float to the surface and escape the potentially deadly current. Diving has risks. but the scientists who work underwater train to deal with these dangers For Jaspars, the rewards of research and underwater adventure are greater than the risks. He searches for unusual chemicals made by ocean life. then he analyzes them for ingredients(成分) that might serve as medicines for people. The sea may seem like a strange place to lo