题目

The Psychology of SpendingHave you ever stayed up “chopping your hands” during the Double Eleventh Shopping Festival? Does possessing the latest iPhone 12, designer purse or limited sneakers really brighten your day? 【1】Dr. Thomas Gilovich, psychology professor at Cornell University, has studied the topic for over 20 years. According to Dr. Gilovich, “We buy things to make us happy, and we succeed, but only for a while. New things are exciting to us initially, but then we adapt to them.” 【2】Dr. Gilovich has found that our satisfaction with possessions fades over time. Yet our h关于运动的合成和分解，下列说法正确的是（　　）A．合运动的时间等于两个分运动的时间之和B．匀变速运动的轨迹可以是直线，也可以是曲线C．曲线运动的加速度方向可能与速度在同一直线上D．分运动是直线运动，则合运动必是直线运动