—It is reported his fortune is up to $37 billion. However, he led a dog's life during his childhood.
A:had a happy life
B:lived a hard life
C:lived with a dog
有些食物中含非金属元素较多,如氯、硫、磷等,在人体内代谢后可形成阴离子酸根,这类食物在生理上称为成酸性食物,习惯上称为酸性食物;而有些食物含金属元素较多,如钾、钠、钙、镁等,在人体内代谢后可形成含金属阳离子的碱性物质,这类食物在生理上称为碱性食物.请问:
(1)肉类、蛋类、鱼贝类属于____(填酸性或者碱性)食物;
(2)蔬菜、水果、薯类属于____(填酸性或者碱性)食物.
如图,组合体的俯视图是( )