2023年湖北省高三七市3月调研日语参考答案

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2023年湖北省高三七市3月调研日语参考答案试卷答案，以下是该试卷的部分内容或者是答案亦或者啥也没有

13.y=32x+70由题意得2016,2017,2018,2019年,分别对应x=1,2,3,4,所以x=1+2+3+=2.5,y=过,12410+10+10+2010:-1+2+32+4=30,8=《·:xy=1×100+2×140+3×160+4×200=1660,所以b=∑xy-4xy166-4×2,5×15=32.所以a=y-bx=∑30-4×2.550-32×25=70.所以y关于x的线性回归方程为y=32x+70

3.【答案】C【解析】抛物线x2=4y的焦点为F(0,1),准线为y=-1,点P到直线y=-10的距离是12,则点P到准线y=-1的距离是12-9=3,所以根据抛物线的定义得,点P到焦点的距离也是3.故选C.

(1分)18.答案:(1)2√21m/s(2)2m/s解析:(1)当物块下滑到B点时刚好与传送带共遠时,传送带速度最(2分)解得:v=2√21m/(2分)vb(2)刚好通过最高点时:mg=R(2分)cmvDC到D过程由机械能守恒有2)0+mg2R(2分)下设传带的速度至少为v1,物块经位移x与传送带达到共速,则由动能定理有因p

One possible versionSeveral minutes later, the ice broke suddenly and Harry's feet sank into the water. It was noep, but his legs got wet to the knees. Harry was so upset that the accident would delay hisschedule. He had to find some firewood to build a fire to dry his clothes. He pulled off his glovestook out his matches, and lighted the fire. Seeing the burning fire, he had thought he was safe. Butsuddenly, without warming, a heavy mass of snow dropped down. The flame of hope was put outUnluckily, his dog ran away and the fear of death came over Harry. He had no choice but torun to save himself. However, he did not feel his feet when they hit the ground. Having falleneveral times, he decided to rest a while. As he lay in the snow, he noticed he was not shaking. Hecould not feel his nose or fingers or feet. A feeling of horror came into his mind. It was when herealized he was going to die that he heard a bark and the noise his friends made

第二节61. to hear 62 reaction, 63.disappointed 64. that65.letting 66, were. 67.has made 68 for 69.largely70.the