“结构与功能相适应”是生物学的基本观点之一.有关结构与功能的描述.不相符的是( )
A:家兔的盲肠粗大,与消化肉食性食物相适应
B:家鸽的气囊储存空气.能辅助呼吸,并散发体内的热量
C:蝗虫体表被有外骨骼.可防止水分蒸发.更好地适应陆地生活
D:神经元有许多突起有利于接受刺激产生兴奋并传导兴奋
以下哪些现象能证明地球是个球体( )
当前,人们的消费心理已从过去的“价格——需要——品牌”转变为“需要——品牌——价格”。部分消费者更关注产品品牌与企业信誉。上述材料说明( )
①人们生活消费的质量有了显著提高
②人们在购买商品时更注重产品质量,不考虑价格
③人们的消费观念发生了重大变化,更加注重消费的质量
④只要有好的品牌,人们就会消费
1985年5月,中共中央作出《关于教育体制改革的决定》,明确提出教育体制改革的根本目的是提高民族素质,多出人才,出好人才,贯彻教育为社会主义建设服务,教育与生产劳动相结合,德智体全面发展的方针。此次教育改革( )
阅读短文,下列问题
B
December 25 is Christmas Day(圣诞节). Christmas is an important holiday in many countries. OnChristmas Day, most families get together for a big dinner. They give presents to each other and visit friends. The Christmas tree is an important part of the Christmas holiday. Most families buy trees. The families decorate(装饰) the tree together. Parents usually tell their children that Father Christmas comes during the night and brings presents to good children. Of course, Father Christmas isn't real. The parents of the children are really“Father Christmas”. They put the presents under the tree or into their children's stocking(长统袜)after the children go to sleep.