小红设计了如图甲所示的电路来测量一个未知电阻的阻值，其中R_x为待测电阻，R₁为电阻箱 ，S为单刀双掷开关，R为定值电阻．

实验主要步骤有：

    A．把开关S接b点，调节电阻箱，使电流表的示数为I；

    B．读出电阻箱的示数R₁；

    C．把开关S接a点，读出电流表的示数为I；

    D．根据电路图，连接实物，将电阻箱的阻值调至最大．

“十月革命奏响了科学社会主义从理论走向现实的第一首凯歌。”十月革命的最大成果是                                         

若关于的不等式有实数解,则实数的取值范围为(    )

      An Englishman was showing a foreign visitor around London. “What’s that strange building?” asked the visitor. “That's the Tower of London.” “I see. How long did it take to build it?” “About 500 years.” “In my country we can build it in five months,” Shortly after that they came to St. Paul's Cathedral(大教堂). “Very interesting!” said the visitor. “How long did it take to build it ?” “Near forty years.” said the Englishman. “In my country we can finish it in forty days at most,” said the visitor. This went on all day.
      They visited most of the best known buildings in the city. Every time they saw a new one, the visitor asked what it was and how long it took to build it. Then he said that they could do the same thing much faster in his country.
      At last the Englishman got angry with the visitor though he tried not to show it. Several days later they came to the House of Parliament(议会)and the visitor asked his usual question, “What is that?” The Englishman answered, “ I have no idea. It wasn't there last night.”

I  don’t  like _______ .