如图所示为两个用摩擦传动的轮子，A为主动轮，已知A,B轮的半径比为R₁：R₂=1：2，C点离圆心的距离为 $\frac{R_2}{2}$ ，轮子A和B通过摩擦的传动不打滑，则在两轮子做匀速圆周运动的过程中，以下关于两轮缘上A、B点及C点的线速度大小V、角速度大小ω、转速n之间关系的判断中正确的是（   ）

— What are you going to do today?

— _____________. （  ）

    Jenny is Mr. White's little daughter. She is good at Art . But she isn't good at Math. Mr. White is teaching her ,”What's six plus three?”

    Jenny counts her fingers and answers ,”It's nine .”

    “Good .What's twenty minus three?”

    Anna counts her fingers and toes. “Mm.it's five .No , it's seventeen .”Jenny answers slowly.

    “What's eleven plus twelve, then ?”Jenny looks at her fingers and toes . They are not enough (足够). Seeing this , Mr. White isn't glad and says, “Use your head, Jenny .”

    “That's not enough .I've got only one head.”

根据短文内容，判断下列句子是否正确。

有报道称，中国人每年在餐桌上浪费的粮食价值高达2000亿元，被倒掉的食物相当于2亿多人一年的口粮。对“舌尖上的浪费”认识正确的是（）
①不仅助长奢靡之风，也是对他人劳动的不尊重
②这表明我国人民生活水平大大提高，符合现阶段基本国情
③这警示我们要大力弘扬艰苦奋斗、勤俭节约的优良传统，杜绝浪费行为
④这要求我们降低消费水平，尽量做到不消费、少消费