两只小灯泡的电阻分别为R₁和R₂，且R₁=2R₂．当两灯串联后接在某电源上，其总功率为P₁；当两灯并联后接在同一电源上，其总功率为P₂．则P₁：P₂为（　　）

中国药学家屠呦呦获得2015年诺贝尔生理学或医学奖。屠呦呦的获奖是中医药对人类健康事业作出巨大贡献的体现。中医把人体看成一个以心为主宰，五脏为中心的统一体，这个统一体可分为五个系统。这五个系统通过经络相互连结在一起，相生相克而相互调节，维持人体的协调和平衡。这一理论（  ）

①体现了整体和部分的辩证统一关系

②体现了整体的功能是部分功能的相加

③表明关键部分对整体功能的发挥具有统率作用

④要求用综合的思维方式认识事物

(B)

    It's Sunday morning. There are many people in the park.and some boys are playing basketball. There are some girls under a big tree. They're singing and dancing. What are those women doing? They are drinking tea. Look at the woman in a blue coat. Who's she? She's my mother. She is talking to Lin Feng. Lin Feng is her student. He is a good student．He studies hard．He's good at all the subjects. And he's friendly to all his teachers and his friends.

下列句子划线词语的解释错误的一项是（）