问题 问答题

如图所示,一带负电的粒子(不计重力)进入磁场中,图中的磁场方向、速度方向及带电粒子所受的洛仑兹力方向标示正确的是(  )

A.

B.

C.

D.

答案

A、带负点的粒子向右运动,掌心向外,四指所指的方向向左,大拇指所指的方向是向下,选项A错误.

B、带负点粒子的运动方向与磁感应线平行,此时不受洛伦兹力的作用.选项B错误.

C、带负点的粒子向右运动掌心向外,四指所指的方向向左,大拇指所指的方向是向下,选项C正确.

D、带负电的粒子向上运动,掌心向里四指应向下,大拇指的方向向左,选项D错误.

故选C.

写作题

第二节读写任务 (共1小题,满分25分)

阅读下面的短文,然后按照要求写一篇150词左右的英语短文。

Dear Ari,

As you sleep in my arms, I'm amazed at how light you feel. I stare at your tiny body, so fragile that a sudden wind could lift you up into the air. I love this feeling of protecting you and dreaming of all I have in store for you.

I intend to bring you up to be brave and successful in an often difficult society. That's why your mommy and I have named you Ari, which means "lion". It's our hope that you will grow strong and eagerly grasp every opportunity to do well for yourself and others.

Before you came into the world, we had spent months imagining what you'd be like. Would you be a boy or a girl? Would you look like Mommy, Daddy or your elder brothers? Anyway, we would find out soon.

Finally your mother's labor came. And several hours later, we met the first time. I held you high up in the air. I then was able to cut your umbilical cord (脐带) and put you in your mother's arms. She still had enough energy to radiate the love while she pressed you to her face.

And here we are tonight. As I hold you close, you sleep so peacefully. I press my ear to your chest and hear your strength. I am listening to the first beats of a lion's heart. Welcome to the world, Ari.

Love,

Daddy

[写作内容]

假设你就是信中的Ari,父亲在你出生的时候写了这封信。今天是父亲50岁生日,你准备以写信的方式,祝贺他的生日。以下是信的内容(信的开头和结尾已经为你写好):

1.以约30个词概括父亲在他信中对你的期望;

2.以约120个词表达你对父亲的感恩,并包括如下要点:

(1)、读信后的感受;

(2)、以你自己成长的经历说明你的感受;

(3)、表达你对父亲的感激和祝福。

[写作要求]

1.作文中可使用自己的亲身经历或虚构的故事,也可以参照阅读材料的内容但不得直接引用原文中的句子; 

2.信中不能出现真实姓名和学校名称。

[评分标准]  概括准确,语言规范,内容合适,篇章连贯。

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单项选择题