在物理学中，磁场的强弱用磁感应强度（用字母B表示，国际单位是特斯拉，符号是T）来表示，磁感线越密的地方，磁场越强，磁感应强度B越大.

（1）在图20中，甲为某磁极附近磁感线的方向和分布的示意图，由图可知，该磁极为 ▲ 极，若在l处放置一个小磁针，当小磁针静止时，其指向应是图乙中的  ▲   .
（2）磁敏电阻阻值的大小随磁场的强弱变化而变，图丁是某磁敏电阻R的阻值随磁感应强度B变化的图象，据图线可知，磁敏电阻的阻值随磁感应强度B的增大而▲ ．图线没有过坐标原点，说明  ▲  .
（3）王强设计了一个可以测量该磁敏电阻R的电路如图丙所示，（其中磁敏电阻所处的磁场未画出）．将该磁敏电阻R放置在磁场中的位置某处，测出电阻后，利用R—B特性曲线可以读出相应的磁感应强度.
①在图甲磁场中1处，测得的数据如图20表中所示，则该磁敏电阻的测量值为 ▲ Ω. 
②根据该磁敏电阻的R-B特性曲线可知，1处的磁感应强度为   ▲    T.
③在实验过程中，仅将磁敏电阻从1处移至2处，其它条件不变，那么电流表的示数
▲   （填“增大”、“减小”或“不变”）.
④依据上述方法获得的磁感应强度B的测量值与该点实际值存在不小的误差，为尽可能准确反映空间某点磁场的强弱，你认为在选择磁敏电阻时应注意什么问题？

书面表达

根据图画和所给单词，将成语“郑人买履”译为英文小故事。词数在60—80之间。

          

关键词：measure测量; ruler尺子; advise劝告

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1 

阅读下列短文，根据其内容完成后面各项任务。

These days, more and more young people wish to be more beautiful, so they turn to plastic surgery(整形手术)for help. They spend thousands of yuan ①       these painful surgeries to fix their nose, to change their eyelids(眼皮) or to take off weight from their stomachs.

②In fact most people are not pleased with the way they look. Even ③最美丽actresses often wish they could change something about their looks. Should we live our whole lives believing we are ugly? Why can’t we raise our head high and believe that we are as beautiful as others? A smile is beautiful on my face, whether fat, oily or hairy. And a kind heart is much more beautiful than a pretty look. So, let’s feel grateful that we all have beautiful and healthy bodies that do not need surgeries! Today, I call on you to make an easy change: hold your head high, smile and be kind to others. If you do these, you will ④be full of confidence, beauty, and warmth everywhere you go.

1.请在①处填上一个正确的介词。                      

2. 请将② 处句子译为汉语。                           

3. 请将③处短语译为英语。                            

4. 写出④处的同义词语                                 

5. 判断正（T）误(F).

（  ）The writer thinks a pretty look is much more beautiful than a kind heart.

 

It was a dark and cold night．The taxi driver didn’t have even one passenger all day．When he went by the railway station，①he saw a young man coming out with two bags in his hands．So he quickly opened the door of the car and asked，“Where do you want to go，sir?”
“To Star Hotel，”the young man answered．When the taxi driver heard this，he didn’t feel happy any more．He knew the young man could give him only three dollars because the hotel was not far from the railway station．But suddenly，he had   ②  idea．He took the passenger through many streets of the big city．
After a long time，the car arrived at the hotel at last．“You should pay me fifteen dollars，”the driver said to the young man．“What? Fifteen dollars! Do you think I’m a fool? Only last week, I took a taxi from the railway station to this same hotel and I only gave the driver thirteen dollars．I know how much I have to pay for the trip．I won’t pay you one dollar more than I paid to the other taxi driver last week．”
1. 请将句中①处句子译为汉语。                                                
2. The young man wante to go to the               .
3. 请在②处填入一个正确的冠词。                                           
4. 请在文章中找出和下面的句子意思相同的句子。
The hotel is near the station.
                                             
5. How much will the young man pay the taxi driver ?