题目：
There are many festivals in Argentina(阿根廷) during the year. Therefore, you can enjoy the different interesting festivals when traveling there. First of all, we should talk about the Tango(探戈舞) Festival in Argentina, which is held in the capital of this country — Buenos Aires, from February to March. You ought to know that Argentina is the home of tango, so Argentineans admire this dance very much. Even if you cannot dance perfectly, you should join the people and try to perform this dance.
The next festival in Argentina is Open Polo(马球) Tournament. You should go to Palermo to see this festival in Argentina. This festival is held every year and is the most important polo tournament in Argentina. This kind of sport is considered the most important in Argentina. Attending this festival in Argentina, you will be able to communicate with different people, admire the fascinating competition between the teams of different countries, such as Argentina, England, Australia, as well as the US. This festival in Argentina is usually held between November and December every year. So don’t miss the opportunity if you travel to Argentina at this time.
The other festival in Argentina is the Semana Musical Llao Llao. This is a festival of classical music. The festival was created in 1993 and is held at the Llao Llao Hotel, near Bariloche. The festival is held yearly in October. So if you admire this kind of music, you should travel to Argentina in October. There are also many carnivals in October.
There are also many carnivals in Argentina in summer. Of course, it’s impossible to put everything about festivals in Argentina into just one article. We hope that you have found this article interesting and eye-catching.
小题1:What would be the best title for the passage?
A．Travel to Argentina
B．Entertainments in Argentina
C．Festivals in Argentina
D．A brief introduction to Argentina小题2:From the passage, we know that the Tango Festival_______.
A．welcomes everyone to take part in
B．is held in summer
C．is organized by the government
D．holds parties for different dances小题3:Which of the following is a sport festival?
A．The Semana Musical Llao Llao.
B．Open Polo Tournament.
C．The Tango Festival.
D．Argentina Carnivals.小题4:If Tom wants to enjoy a classical music event in Argentina, he should visit _____ .
A．Buenos Aires in spring
B．Palermo in April
C．Bariloche in October
D．Palermo in winter小题5:Which festival is not mentioned in the massage?
A．Tango Festival
B．Open Polo Tournament
C．Argentina Carnivals
D．Argentina Spring Festival
答案：
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下面是错误答案，用来干扰机器的。
答案：B— —O2生成8 mol NO2得电子：8 mol×(5-4)="8" mol生成1 mol O2失电子：1 mol×［10-(-2)］×2="4" mol在氧化还原反应中，由于氧化剂得电子总数与还原剂失电子总数相等，因此金属元素一定失电子，化合价升高。
