化学与人类的进步密切相关，为人类的生产、生活提供了物质保证．如海洋中含有丰富的资源，是人类的巨大宝库，如把海水淡化和化工生产结合起来，既可解决淡水资源缺乏的问题，又可充分利用海洋资源．
A. —Is Ann reading a book? —No, she isn't. She's making a sandcastle.
B. Look at Tom. He is walking (走路）on the beach. He is very hot.
C. —Are the children collecting shells on the beach?—Yes, they are.
D. Look at John and Lily. They are flying kites in the park. They are happy.
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给下面加线字注音，无误的一项（ ）
曙（ ） 哺育（ ） 停泊（ ）浦（ ）
读俄罗斯境内60°N地形剖面图，并结合所学知识，完成下题
