题目

如图所示的电路中，R1、R2均为定值电阻，R3为可变电阻，电源的电动势为E，内阻为r．设理想电流表A的读数为I，理想电压表V的读数为U．当R3滑动触头向图中a端移动时（  ）                                                                                                                            A． I变大，U变小                 B． I变大，U变大    C．      I变小，U变大    任务型阅读                        The 24th FISM World Championship of Magic Opened in Beijing    The International Federation of Magic Societies, or FISM, kicked off in Beijing, It lasted _______ July 26 to 31, and brought more than 2,000 magicians(魔术师) from around the world.      It is the first time China has hosted such an event, and the first time the FISM world championship has been held in a developing country. Lin Jian, the secretary general of the event's organizing committee(委员会), said it was a good opportunity for the Chinese magic circle to learn from the world.     Magic has a long history in China. Actually, China is one of the three countries that created the magic art form. However, during the period of the "Culture Revolution", China' s magic has fallen behind on the international scene. Along with the opening-up policy, many Chinese magicians went abroad to learn from the rest of the world and many foreign masters have come to perform or give(2) lectures in China.     For the 2009 CCTV Spring Festival Gala, Liu Qian put on two magic shows. He attracted great attention and wide interests from the audience.      (3) Now the public is showing more interests in magic.  (4)Lots of people love to see magic shows and even many children would like to learn magic  skill.  we can also see that some shops selling magic equipments. In Beijing, a group of college students have set up a magic alliance (联盟). That' s important for the development of the magic arts in China. As long as the number of magicians is growing, our performing and skill levels will be improved.    Several Chinese magicians enrolled in the  championship.根据短文内容，完成下列任务。1. 根据上下文在空白处填写一个适当的单词：2. What's the meaning of the word "lectures"?  ________3. 写出文中划线句子的同义句：  Now the public____ ______ ______ _________  magic．4. 根据短文内容，回答下面的问题。    When did China's magic fall behind on the international scene?    ________________________________________5. 把文中划线句子(4)翻译成汉语。    ________________________________________