题目

在图所示电路中，电容器C的上极板带正电，为了使该极板带正电且电量增大，下列办法中可行的是（    ） A、增大R1，其它电阻不变    B、增大R2，其它电阻不变 C、增大R3，其它电阻不变    D、增大R4，其它电阻不变 答案：AD Dear Kate,My first stop in London was Buckingham Palace. Kings and queens and their families have lived in Buckingham Palace since 1837. Queen Victoria made Buckingham Palace her home in 1837. But it was not big enough for all her guests. More importantly, it was not big enough for all the children she planned to have, so she made the palace bigger and bigger.I saw a parade at Buckingham Palace this morning. It's called the Changing of the Guard. It's fascinating. The guards wear interesting uniforms with red coats and tall hats. Since 1660, the kings and queens of England have had these special guards to protect them.The ceremony(仪式) lasted about 45 minutes. The new guards marched to the palace with a band to replace the old guards. They did this in a colourful ceremony with music. It's interesting that they played both traditional music and popular songs. The Changing of Guard takes place in front of Buckingham Palace every day in spring and summer, and every two days in autumn and winter.I went to the Houses of Parliament after I saw the Changing of the Guard. What are the Houses of Parliament? Well, I guess the country's leaders meet there to discuss important decisions.Next to the Houses of Parliament stands a tall clock tower. Most people call it Big Ben. You know what? The name Big Ben does not refer to the clock tower. Big Ben is actually the 13-ton bell inside it!Take care!Judy1.What's the most important reason for Queen Victoria to make her palace bigger and bigger?A. She wanted to have big meetings there. B. She had more and more guests.C. She planned to have a lot of children. D. She wanted it to be more famous.2. Which is NOT true about the Changing of the Guard?A. The guards wear red coats and tall hats.B. The ceremony lasts less than an hour.C. The guards played different kinds of music.D. The ceremony was held in the Palace.3.In winter if you miss the Changing of the Guard ceremony on Wednesday, you may watch it ____.A. on Thursday B. on Friday C. only next week D. only next month4. The underlined word "replace" most probably means_______.A.替代B.问候C.看望D.检查5. How many places of interest does Judy talk about?A. Five. B. Four. C. Three. D. Two.