如图所示，两条弯曲的金属导轨放在xoy坐标平面内，金属导轨是形状是正弦曲线的二分之一个周期，它们之间最近间距很小但彼此绝缘，左端通过电阻R连接。坐标平面内有垂直于该平面的匀强磁场，磁感应强度的大小为B．一根平行于y轴的长导体棒沿x轴以速度V匀速运动，运动过程中与两金属导轨良好接触，导轨足够长，除R外其余电阻都不计。则通过R的电流的有效值是：
A．
B．
C．
D．
 |
China is a great country with the largest population in the world．In order to solve the population problem，our government carried out one﹣child policy （政策）before．When it is carried out for some time，many people not only see its advantages but also disadvantages．
From 2016，two﹣child policy is put into effect．In my opinion，two﹣child policy is good．First of all，two﹣child policy is the gift for some only child．For some families，maybe the parents are only child and they also can have only child．Besides the loneliness of their child，when their child grows up and they grow older，their child marry an only child girl，the burden（负担）on their child and his wife is too heavy．Their child and his wife have to take care of two couples．Usually，a young couple looking after an old couple is a little difficult．But if their parents have two children，they can share the burden of taking care of their parents．It would be much better．Secondly，two﹣child policy can guarantee （保证） the number of Chinese population．
All in all，one﹣child policy has been out of date．And two﹣child policy is needed and necessary．It can solve the problems of nowadays （现在）and the future．
（1）Which country has the largest population in the world？
A．America．
B．Britain．
C．China．
D．Japan．
（2）The underlined phrase"carried out"in Paragraph 1 means" "in Chinese．
A．携带
B．取消
C．禁止
D．实行
（3）Our government carried out one﹣child policy before in order to ．
A．solve the population problem
B．take care of two old couples
C．share the burden of taking care of their parents
D．argue that two﹣child policy should be put into effect
（4）According to the passage，which of the following is NOT true？
A．One﹣child policy has its advantages and disadvantages．
B．It's easy for a young couple to look after an old couple．
C．China is a great country with the largest population in the world．
D．For some families，maybe the parents are only child and they also can have only child before 2016．
（5）What's the main idea of this passage？
A．Two﹣child policy is needed and necessary．
B．Our government carried out one﹣child policy．
C．Two﹣child policy is the gift for some only child．
D．Two﹣child policy can guarantee the number of Chinese population．
Bury trip﹣﹣June 18th，2016
We will be leaving the Perse School at 13：45．Please be at the school gate 10minutes early．If you are late，you may miss the bus and not be able to go!If you miss the bus，you won't get your money back．The bus is planned to arrive in Bury at 14：30，although this depends on traffic．You will have free time to walk around and we will meet at the same location where we arrived at 17：15to return to the Perse School by about 18：00．
Things to do Visit the Abbey
The Abbey is the min （废墟）of a church which was built more than 1，000years ago．There are many nice gardens in it．And next to the Abbey，there is a big new church．
Have a drink in the Nutshell
This little bar is famous in Britain because it is officially （正式地）the smallest bar in the country．Good things are put in small bags，and the Nutshell serves some of the area's finest beer，as well as fascinating photos．
Have a look at a beer shop
At the Greene King shop you can taste and buy some of the local beer，as well as food such as potato chips．There are also clothes available to buy．
Several places are listed，but feel free to plan your own visit．
46．If Sara wants to take part in the trip，when should she arrive at the Perse School gate？
A．At 13：35．
B．At 13：45．
C．At 14：20．
D．At 14：30．
47．What can we see in the Abbey？
A．A big museum．
B．Tall towers．
C．Nice gardens．
D．A new church．
48．The Nutshell is famous in Britain because of its ．
A．small size
B．good service
C．best beer
D．interesting photos
49．What can we buy at the Greene King shop？
①beer②potato chips③postcards④books⑤clothes
A．①②④
B．①②⑤
C．②③④
D．③④⑤
50．The material is probably ．
A．a report
B．a diary
C．an introduction
D．a notice．
"If you agree with me，please Dianzan．"Do you know Dianzan is one of the most popular words on the Internet？When you think someone's ideas are right，when you think someone's articles are （1） ，or when you are moved by what someone writes，you can
click （点击）the praise sign．Anyhow，clicking the praise sign （2） that you agree with someone or praise someone．
Dianzan is a kind of Chinese Internet language．People （3）
use it when they surf the Liternet．There is a function（功能）of Dianzan in the QQ space．The QQ space has had the function （4） 2010．It didn't become very popular until Sina blog（新浪博客）（5） the function of Dianzan．In recent years，it has become more and more popular．When the 2015New Year came，Chinese leader Xi Jinping used the word Dianzan to praise and （6） his thanks to the great Chinese people．
Websites can know how many people support some ideas （7） counting how many people click the praise sign．Experts can know （8） teenagers are caring about through what they click the sign for．That can help them solve teenagers'（9） ．
Clicking the praise sign is really a（n） （10） thing．Have you ever clicked the sign for anybody on the Internet？
| （1）A． wonderful |
B． terrible |
C． hard |
D． awful |
| （2）A． offers |
B． takes |
C． means |
D． avoids |
| （3）A． never |
B． luckily |
C． slowly |
D． usually |
| （4）A． after |
B． since |
C． in |
D． before |
| （5）A． broke |
B． checked |
C． refused |
D． started |
| （6）A． accept |
B． express |
C． create |
D． receive |
| （7）A． by |
B． on |
C． at |
D． under |
| （8）A． that |
B． where |
C． what |
D． when |
| （9）A． plans |
B． happiness |
C． problems |
D． fairness |
| （10）A． difficult |
B． surprising |
C． embarrassing |
D． easy |
Where there is a will，there is a way．
Thanks，Mr．Li．I'll try my best to improve my English．（ ）
A．Best wishesB．Never give up
C．Have a good tripD．What a pity
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