秦汉以后，县有等第之分，当时以该县户口多寡划分。唐代开始，县的分等标准明确规定为地位、户口与地理条件的综合。明代以缴纳钱粮的数额来分等。清代则将“冲繁疲难”（交通频繁；行政业务多；税粮滞纳多；犯罪事件多）作为政区分等的正式依据。从县的等第划分演变中，可以得出的主要结论是（    ）

    In many classrooms, it's not 1 to find students spinning (旋转) their pens 2 they listen to their teachers.
    Pen-spinning is also popular  3 Japanese students. It is a form of entertainment. Recently, a pen-spinning competition was held in Tokyo, Japan. Ryuki Omura, a 16-year-old high school student, became the first pen-spinning 4. 276 people took part in the competition. The came from different age groups. Some were students 5  some were office workers. First, they  6the videos of their pen-spinning skills to the organizer's website. Then some of them came to the last round in Tokyo. 7 of them had 30 seconds to show their skills in front of 400 people, 8reporters and fans. Omura took a pen from his little finger to the rest fingers, then to his palm(手掌) and the back of his hand. His wonderful show made him   9 the champion.
    Omura said he began learning pen-spinning only about 14 months ago. He did  10 in the competition. If you like to spin your pen, you can practice it in your spare time. But when you are in the class, please don't do that.

在测量“小灯泡正常发光时的电阻”的实验中，选用电压恒为6V的电源，额定电压“3.8V”的小灯泡．如图甲中是未连接完整的实验电路．

下列各句中没有语病的一项是 （ ）

 你好，我是吉姆。