2022智慧上进理综全国3卷答案

2022智慧上进理综全国3卷答案，目前我们已经整理了2022智慧上进理综全国3卷答案的各科答案和试卷，更多智慧上进请关注本网站。

第四部分第一节Last Saturday,Liu Wei helped an injured woman.He was on his way to the English speaking competitionwhile a woman in the front of him fell off her bicycle.She struggled to get to her feet and failed,because herwhenbutright leg were bleeding badly.Without hesitation,Liu Wei came to her assist.He applied pressure to thewasassistancebleeding area and tied a handkerchief firm to the wound.Finally,Liu Wei took him to the hospital nearby.firmlyherIt was at that time then he realized it was too late for the competition.thatAlthough he miss the competition,he gave the woman in need A hand.We should learn from him.missed

34.(1)BCD解析：根据传播方向与振动方向关系，波向左传播则质点的起振方向向上，选项A错误：由波动图像可知波长入一4m,c质点（一3,0在6=1.0s时刻第一次位于波蜂，有-号+？。=今，得。-5m/s,个-0.8s,选项B正确：由波形图可知t=0时，质点a已振动半个周期，其振动方程y.=10sin(2.5πt十π)(cm),选项C正确；质点c振动方程y.=10si(2.5t)(cm),波传播到质点c的时间t==0.8s,=1.5s时刻，t=2一t=0.7s,此时质点c的位移y.=10si(2.5x×0.7)=一5，√2cm,选项D正确：若该波能够与另一列波发生干涉，则干涉后振动加强点的振幅不一定变为20cm,选项E错误(2)解：作出光路如图所示，设光在界面发生全反射的临界角为C,由s血C一】，解得C=45°(3分)当入射角<45时，光线从侧面折射出去(3分)由几何关系可知，侧面上DE对应侧面、FJ对应的侧面有光线折射出去，同理对称的另一侧面也发出光线，故发光区城面积S=2L[L+(停L-2)]=4063+Dm（4分)