莫言说：“高密有泥塑、剪纸、扑灰年画、茂腔等民间艺术，我从小耳濡目染。创作的时候，这些民间文化元素就进入我的小说，甚至决定了作品的艺术风格。”这段话说明（    ）

某种有机化合物R完全燃烧的化学方程式为：2R+3O₂ 4H₂O+2CO_2，根据质量守恒定律，R的化学是( )

    Many people like animals．Now a lot of people keep animals as pets(宠物)．Usually people like to keep dogs，cats，fish and other animals．Many young people keep animals because they think these animals are interesting．Some old people keep pets because they don’t live with their children．

    Martin lives in No．25 Garden Street．He is a doctor(医生)，but he helps dogs．People usually call him The Dog Doctor．When their dogs get sick(生病)，they call him on the telephone．He goes to the people’s houses and helps them．He gives the dogs the right medicine(药物)．Wherever(无论)he goes，he is always welcome．

“海阔凭鱼跃，天高任鸟飞”。下列哪项不是家鸽与飞行生活相适应的特点？