「2023衡中同卷轴测卷生物 答案」衡中同卷滚动卷生物

「2023衡中同卷轴测卷生物 答案」衡中同卷滚动卷生物，目前我们已经整理了「2023衡中同卷轴测卷生物 答案」衡中同卷滚动卷生物的各科答案和试卷，更多衡中同卷请关注本网站。

第四部分写作第一节短文改错Many year ago,my friend Li Wei bought a computer game and asked A play it on my father's computer.Myyearstofather warns me not to use his computer for playing games because he used them for his job.However,after mywarneditDad was out,we decided to try a game.When we finished,we took it off the computer to make sure of that mythefather wouldn't notice anything.But when my Dad began to enjoy use the computer the next night,it refused tousingwork because it had a virus.I felt real sorry about it and told him what we did.Heard the story,my fatherreallyHearingwasn't scold me,but praised my honesty.didn't

9.(1)2.5m/s≤≤5m/s(2)600个【解析】(1)若第一个粒子落在下板的中点，则(1分)可得o1=2.5m/s从(1分)若落在下板的右端点，则L=,号=弓g(2分)解得vo2=5m/s3(1分)则2.5m/s≤%≤5m/s(2分)(2)第一个粒子刚好落在下板中点，则粒子入射的初速度为%1=2.5m/s(1分)》从最右端射出的粒子，由L=o1t(1分)》可得t=0.04s(1分)又号-7ar(1分)解得a=2.5m/s2(1分)由牛顿第二定律可知mg一qE=ma(2分)又E=号=8(1分)解得Q=6×10-6C(1分)则n=9=600个(2分)q