2018-2022 英语周报 高二 课标 42答案

读后续写 One possible version)A bad guy just p/cked Kim up and took her away! yelled Julie. So shocked were Kims parents thatthey jumped up from the sofa and rushed over to Julie. Learning what had happened, they phoned thepolice without delay. The nextnt, they jumped into their car and drove off directed by Julie. By thenT had reached the alley, but the man was nowhere to be seen. "I must find Kim, "TJ said to himself. Heran along the alley to the end, where he spotted the man walking towards a white house. "Stop! Stop Withhese words, he charged at the guy fearlessly and held fast to Kim. However hard the guy tried to get rid ofTJ. TJ wouldnt give inAt that very moment, Kim s parents arrived. Help! Help! "TJ shouted. Immediately Kim's father tookoff toward the guy. Seeing this. he guy hurriedly let go of Kim and broke into a run. Kim's father dashedup, caught hold of him and pressed him to the ground. Kim ran crying into her mother s arms. Minutes later,the police arrived and arrested the guy. TJ breathed a sigh of relief and smiled happily. T]'s quick thinkingand bravery saved a little girl in the neighborhood from unimaginable consequences

解得T-T(1分)(1)对左侧的气柱1,开始时的压强PA=P pxh=9egh,气柱的长度为1x=2h,当左右两水银面相平时,左侧的气柱A长度为14=1.5,设气体的压强为pA,根据玻意耳定律有PatAP(1分)解得pA=12pgh(1分)对右侧气柱B,开始的压强PB=p=8xh,气柱的长度为lB=k,当左右两水银柱相平时,右侧的气柱长为…设气体的压强为pn,巾力的平衡可知,pB=pA=12Pk,根据玻意耳定律有(1分)解得1n=2(1分)所以,活塞下降的距离r=12-1 14=5(2分)二)选考题33.(1)BCE【解析】由于气体分子之间的距离大于气体分子本身的大小,所以气体的摩尔体积除以阿伏加德罗常数大于气体分子的体积,A错误;用油膜法测油酸分子直径时,形成的油膜是单分子油膜,油膜的厚度等于油酸分子的直径,B正确;液体内部分子之同的距离r-r,而液体表面层的分子问的距离r>r,由分子势能随分子间距离变化的曲线可知,液体表面层分子势能大于液体内部分子势能.C出确;温度升高,分子的平均速率变大,但是不是所有气体分子运动的速半都增大,有少数分子的速半叫能减小,D错误;温度升高时,液体分的平均动能增大,单位时间内从液面飞出的分了数增多,蒸汽的压强增大,E正确【解析】(1)设水银密度为P,重力加速度为g·降温时,当管内的水银面左右相平时,有侧气体的压强仍然为p则左侧的气柱A的压强为p3=p=8gh,此时左端气柱的长度1=1.5h(1分)降温前的压强PA=P Ph=9pRh气柱A的长为x=2(1分)根据理想气体状态方程有6

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