wsm

精你妹子 看完就删 不留破绽

- -不发了，

我的错 想精容易啊 现在就可以 关键没流量 让我怎么看

……………………………………套用 灰太狼的一句话 “我会回来的”
尽情的封 吧………………

一环路

M: Why?
W: She hopes her story can encourage other single mothers.
M: So when will you finish it?
W: In three months. I’ve written some. Do you want to read it?
M: Sure. But I have to go swimming this afternoon. I’ll read it this evening.
Text 10
My mother is a very beautiful lady. She is in her late thirties now. She is very tall and has long golden hair. She likes smiling and people around her like her smile. She works in fashion, so she has a lot of beautiful clothes. Her friends like asking her about what to wear. And she often gives them some good advice. My mom often goes shopping with me. But we don’t buy very expensive clothes. She often says that not all expensive clothes look good while some clothes costing not much look good too. My mother likes watching TV at night. She usually watches TV with me for an hour every night. When we are watching TV, we talk with each other like friends. I like talking with her. Not all mothers spare enough time for their children. My mother loves me very much and takes good care of me. She often helps me with my studies. When I have problems in studies and in life, I like to talk about them with her. And she often gives me some advice. Though she is busy with her work sometimes, she cooks for me at home. She often says she is a mother first, then she is an employee. In my eyes, she is the best mother in the world. I love my mother very much!
1-5 CBCCA 6-10 BACBC 11-15 BCABB 16-20 CABCA
21-25 BDCAB 26-30 BACDD
31-35 DCAAC 36-40 ABCDD 41-45 BBCAD 46-50 BCDBD
51-55 CDCDB 56-60 ACBBA 61-65 ADBAD
66. Tips /Advice/Suggestonns 67. interesting 68. watch 69. texts 70. understand 71. friends 72. homework 73. exchange 74. rewards 75. zoo
A possible version
Dear headteacher,
I’m writing to you about the discussion we’ve had on “Picture of an ideal boy”. The majority of my class think that boys should be generous, responsible and gentle. And he should be humorous.
When he grows up into a man, he will be under pressure from others, his family and society. This means that a real man is more than just a good-looking guy. He should be brave, active and knowledgeable. What’s more, he should be loyal to his friends. It’s of great importance that students behave properly. Besides, an outstanding boy should be outgoing and charming.
As far as I am concerned, an excellent boy should be the kind of person who takes responsibility for what he does. He should be filial to his parents and always kind to others.
Yours truly,
Li Hua


2011—2012学年度第一学期期末考试
高二物理（理科）参考答案及评分标准
一、单项选择题：（本题共12个小题，每小题4分，共48分。）
题号
1
2
3
4
5
6
7
8
9
10
11
12
答案
B
D
C
B
A
D
A
B
C
B
A
A
二、实验探究题：（本题共2个小题，共14分。）
13．（10分）（1）②红黑表笔短接，调节欧姆调零电阻，使指针指0Ω。③ 4.0
（2）C （3）0.310mm （4） （每空各2分）
14．（4分） ， （每空各2分）
三、解答题：（本题共4个小题，共38分）
15．（8分）
解：（1）电动机不转动时，功率关系：
电动机的内阻 ……………………………… 2分
正常转动时，消耗的总功率： ……………………… 1分
正常转动时，电能转化为机械能的功率： ……… 2分
（2）如果小发动机在正常工作时，转子突然被卡住，小电动机的发热功率：
………………………………… 3分
16．（10分）
解：（1）正点电荷在A、B连线上速度最大处对应该电荷所受合力为零，即
………………………………… 3分
x= ………………………………………………… 2分
（2）点电荷在P点处如其所受库仑力的合力沿OP方向，则它在P点处速度最大，
即此时满足
tanθ= ……………………… 3分
即得 tanθ＝ ……………………………………… 2分
17. （10分）
解：能从速度选择器射出的离子满足 ………………………… 2分
离子进入匀强偏转电场E后做类平抛运动，则
………………………………………………… 1分
………………………………………………… 1分
竖直方向由牛顿第二定律得 ……………………………………… 1分
解得 …………………………………………………1分
由动能定理： ……………………………………… 2分
……………………………………… 2分
注：若有其他解题方法酌情给分。
18. （10分）
（1）设质子在磁场I和II中做圆周运动的轨道半径分别为 和 ，区域II中磁感应强度为 ，由牛顿第二定律
①
② ………………………………………①② 共2分
粒子在两区域运动的轨迹如图所示，由几何关系可知，质子从A点出磁场I时的速度方向与OP的夹角为300，故质子在磁场I中轨迹的圆心角为
则 为等边三角形 ③
④ ………………………………………③④ 共3分
由①②③④解得区域II中磁感应强度为 ……………………… 1分
（2）Q点坐标 ………………………………………… 3分
故 x ………………………………………… 1分