"It's a such nice place," Mother said as she sat at the table________ for customs. [ ]

A. to be reserved  

B. Living reserved  

C. reserving

D. reserved

鼬遇到危险时，由肛门排出有强烈恶臭味的气体，既有报警作用又有防御功能。这种气体信息与下列哪种情况传递的信息是同一类型（）

A.蒲公英即使在很弱的磁场下，开花也要晚很多

B.鳗鱼、鲑鱼等能按照洋流形成的地电流来选择方向和路线

C.胡桃树能分泌大量胡桃醌，对苹果起毒害作用

D.地行鸟发现敌情时，雄鸟就会急速起飞，扇动两翼，给在孵卵的雌鸟发出逃避信号