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21-22高三上·山东德州·期中)阅读下面材料,根据其内容和所给段落开头语续写两段,使其构成一篇完整的短文。续写的词数应为150左右。

By morning, Afiq knew what he had to do. He had not slept a wink but had sat in the balcony all night thinking. He stretched his body and went back to his room. His brother Affin was still asleep.

It was Saturday and there was no school. Afiq's mother asked him to buy some groceries for her. On his way out, he glanced at his motorcycle with the broken front lamp and scratches on the side. Afiq straightened his shoulders and went to complete his purchase.

It was late morning when Afiq was free to carry out his plan. He marched down the road to Osman's house. When he arrived, Aniya appeared at the doorway and greeted him warmly. She invited him in and served him tea and some cakes. Afiq nervously asked to speak to Osman. She told him that her father was out but would be home very soon. Sure enough, the elderly man returned in ten minutes.

Afiq cleared his throat a few times and said that he had come to confess (坦白). “I'm so sorry. I was careless yesterday and knocked into your parked car,” Afiq said. Osman looked at the 17-year-old youth, surprised, “So, you are saying that you are the culprit (肇事者) who crashed into my car and then ran away?” Afiq went red. He nodded, “I'm sorry for not telling you earlier. I was too frightened.”

The elderly man smiled and said, “But you're not too frightened to confess now?”

Afiq said uncertainly, “I could not sleep last night thinking about it. I knew I had to do the right thing.”

Osman was silent for a minute before saying in a kind voice, “Do you think it a right thing to cover up for your brother?”

注意:

1. 续写词数应为150左右。

2. 请按下列格式在答题卡的相应位置作答。

Afiq went pale, “I... I…you know the truth?”

Afiq thanked Osman for his kindness and then set off home happily.

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21-22高二下·江苏苏州·期中)阅读下面材料,根据其内容和所给段落开头语续写两段,使之构成一篇完整的短文。

At 16, I got what every teenager dreams of — a driver’s license, but I was afraid of driving on the road. “Do you want to drive home, Alice?” Mom asked when she picked me up from school.

I hesitated, saying, “Really? Are you sure?”

“Okay,” I jumped in the driver’s seat as soon as Mom said yes.

When we reached the country road, I stopped. “Now, look both ways,” Mom instructed. “Turn your steering wheel (方向盘) to the left. Give it some gas, but take it slowly. We’re not in any hurry.”

I pulled onto the narrow road. We kept moving and everything was fine until a truck came up. I looked in the mirror. I guessed it didn’t occur to the man to slow down as his truck approached our car. When I failed to speed up, he honked (鸣喇叭). My hands held the steering wheel tightly.

“You’d better turn and let this guy pass,” Mom said.

The guy honked again before I got to where I needed to turn. Mom shouted, “Turn, turn here!”

I felt like I couldn’t make the turn, but I did what I was told. I turned the wheel and our car fell into the ditch (沟渠) alongside the road. My foot hit the gas pedal, and the engine roared like an angry lion. Our car flew across the ditch.

Mom cried, “Hit the brake (刹车)!” The car landed heavily.

My hands dropped from the steering wheel. For a moment, we sat silently. I took several deep breaths, afraid to look at my mom. Finally, she asked, “Are you OK?” “Yeah,” I replied and turned to see an injury to her face. I thought I was going to be blamed, but when our eyes met, she burst into wild laughter. We climbed from the car and leaned against it to steady ourselves.

注意:

续写词数应为 150 左右;

2. 请按如下格式作答。

We had hardly steadied ourselves when we saw the truck driver walking towards us.

______________________

As soon as the truck driver helped drive our car back on the road, Dad called and we drove home.

______________________

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23-24高二上·上海·阶段练习)库仑定律是电磁学中的基本定律之一,是电学发展史上的第一个定量定律,它的建立既是实验经验的总结,又是理论研究的成果,库仑定律的建立标志着电磁学的研究从定性阶段转入定量阶段的研究,使数学进入了电磁学的研究领域,电磁学从此开始走上了严密的定量化道路。

17.关于库仑定律,下列说法正确的是(  )

A.静电力常量的数值是由实验得出的

B.在一个以点电荷Q为中心,r为半径的球面上,各处的电场强度都相同

C.由库仑定律的表达式可知,当时,

D.在库仑定律的表达式中,是点电荷Q2产生的电场在点电荷Q1处的场强大小

18.两个半径均为r的相同金属球,球心相距4r,分别带有电荷量-3Q+Q,它们之间库仑力的大小为F,现将两球接触后再放回原处,两小球间距离保持不变,则两小球间库仑力的大小(  )

A.小于 B.大于 C.等于 D.无法确定

19.如图所示,正点电荷电场中的一条电场线上各位置的电场强度和电势与坐标r的变化规律图像可能正确的是(以无穷远电势为零)(  )

 

A B

C D

20AB是长为L的均匀带电绝缘细杆,P1P2是位于AB所在直线上的两点,位置如图所示,AB上电荷产生的静电场在P1处的场强大小为E1,在P2处的场强大小为E2,则P1P2处电场强度方向(1______(选涂:A.相同  B.相反),若将绝缘细杆的右半边截掉并移走(左半边电荷量、位置不变),则P2处的场强大小变为(2______

 

21.如图,绝缘粗糙的水平轨道ABµ=0.5)与处于竖直平面内的半圆形绝缘光滑轨道BC平滑连接,轨道半径R=0.4m,存在水平向右的匀强电场电场强度E=1N/C。现有一电荷量q=+1C、质量m=0.1kg的带电体从P点静止释放,恰能通过半圆形轨道的最高点C,然后落至水平轨道上的D点(图中未画出),g10m/s2,求:

1)带电体运动到半圆形轨道C点时速度大小;

2P点到B点的距离xPB

3)带电体在从B点运动到C点的过程中何处动能最大?并求出最大动能。(本小题保留2位有效数字)

 

 

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24-25高三上·山东·开学考试)如图所示,光滑的水平轨道右端固定有竖直挡板,挡板上端与固定的竖直光滑半圆形轨道在A点连接,AB为半圆形轨道的竖直直径。在水平轨道左端静止放置一长木板,其上表面与A点等高,并且长木板与竖直挡板碰撞后会立即停止运动。在长木板的左端静止着一可视为质点的小物块,小物块在A点自长木板滑上半圆形轨道时无机械能损失。某时刻使小物块瞬间获得水平向右的大小为的初速度。已知小物块的质量,长木板的质量,半圆形轨道的半径,小物块与长木板上表面间的动摩擦因数,不计空气阻力,取

 

(1)若长木板与竖直挡板碰撞时小物块与长木板已经相对静止,且小物块能够进入半圆形轨道,求长木板的长度L需要满足的条件;

(2)若长木板与竖直挡板碰撞时小物块恰好滑离长木板,之后脱离半圆形轨道后又经第一次落在右侧无限长的水平地面上,自脱离半圆形轨道至第一次落地的水平位移大小

i)求小物块离开半圆形轨道时的速度大小;

ii)求满足该运动的长木板的长度;

iii)小物块每次与地面碰撞后都会反弹,速度与水平地面的夹角在每次碰撞前后均相等,速度大小在每次碰撞后均会减小为该次碰撞前的,整个过程小物块一直在同一竖直面内运动,求小物块停止运动时距AB的水平距离。

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