根据短文内容，从方框中选择适当的词或短语，并用其正确形式填空，使短文完整、正确。（每个词只能用一次，有两个多余选项）

late    send  mean      telephone   sure    write

call    I     such as    go off      clock    early

Some people remember things by 1_______ notes to themselves．Then they leave the notes in obvious places，2_______ on the table or on the floor．I don’t think I like to write notes to 3_______．Most of the time I lose them or forget to look at them until it's too 4_______．I prefer to use an alarm clock to tell me what I should do．I have ten alarm 5_______ in my house．They could tell me about things．For example, if I have to make a telephone call at a certain time，I'll set an alarm clock to 6_______ a few minutes early and put the clock by the 7_______．Or if I want to watch a certain television program．I'll set an alarm clock at the right time and put the clock on top of the TV set．I can remember almost anything if I use my clocks．However, sometimes an alarm clock goes off and I don’t know what it 8_______．I always remember to set it，but not why I set it．If the clock is by the telephone，I know I may have set it to tell me to 9_______ someone，but I can’t be 10_______ I might have set it to tell myself that somebody was to call me at a certain time．

根据短文内容，从方框中选择适当的词或短语，并用其正确形式填空，使短文完整、正确。（每个词只能用一次，有两个多余选项）

late    send  mean      telephone   sure    write

call    I     such as    go off      clock    early

Some people remember things by 1_______ notes to themselves．Then they leave the notes in obvious places，2_______ on the table or on the floor．I don’t think I like to write notes to 3_______．Most of the time I lose them or forget to look at them until it's too 4_______．I prefer to use an alarm clock to tell me what I should do．I have ten alarm 5_______ in my house．They could tell me about things．For example, if I have to make a telephone call at a certain time，I'll set an alarm clock to 6_______ a few minutes early and put the clock by the 7_______．Or if I want to watch a certain television program．I'll set an alarm clock at the right time and put the clock on top of the TV set．I can remember almost anything if I use my clocks．However, sometimes an alarm clock goes off and I don’t know what it 8_______．I always remember to set it，but not why I set it．If the clock is by the telephone，I know I may have set it to tell me to 9_______ someone，but I can’t be 10_______ I might have set it to tell myself that somebody was to call me at a certain time．

如图所示，在虚线AB的左侧固定着一个半径R=0.2m的1/4光滑绝缘竖直轨道，轨道末端水平，下端距地面高H=5m，虚线AB右侧存在水平向右的匀强电场，场强E=2×10³ V/m。有一带负电的小球从轨道最高点由静止滑下，最终落在水平地面上，已知小球的质量m=2g，带电量q=1×10^-6 C,小球在运动中电量保持不变，不计空气阻力（取g=10m/s²）

求：（1）小球落地的位置离虚线AB的距离；
（2）小球落地时的速度。

阅读下列材料：（共13分）
材料一　……(明)神宗时，吕坤在奏疏中说：“洮兰之间小民，织造贩货以糊口……弃业桑农者数百万人，提花染色，日夜无休。”……杭州人张瀚的祖先，成化末年有织机一张，从事纺织，所织布精良，“每一下机，人争鬻之”，因此获利甚多。后来织机发展到二十余张，“家业大饶”，成为雇用“机工”的“机户”了。

请完成：
（1）依据材料一指出明清时期出现的新的经济现象是什么？结合所学知识分析其产生的主要经济因素。(4分)
(2)材料二反映了什么历史现象？它与材料三之间有什么内在联系？(5分)
(3)材料三说明中国近代社会经济结构发生了怎样的变化？这一变化对中国政治产生了什么影响？(4分)