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Many animals died for different ____( 原因 ) .We are____ ( 研究 ) how to improve English.We hope live in ____ ( 和平 ) .His____ ( 表兄 ) is a doctor.We must ____(保护)the animals .There are few____ (自然的)reserves in China .Why do they want to____( 设计 )a poster.
作者写教阅水军与吴中健儿在潮头弄潮,既写风景,又写民俗,人借水势,水借人势,人助水势,水助人势,这样描写有什么好处?
已知点P(x,y)在经过A3,0,B1,1两点的直线上,则2x+4y的最小值为( )
从下面两幅图中能够直接获取的信息是( )