1.选择题- (共2题)
阅读理解
In the last few years the popularity of eBooks has exploded．The advantages are clear：You can carry as many books with you as you want．You can simply download every book you like and instantly start reading instead of having to wait for the book to arrive by mail．
However，one thing hadn't changed．If you wanted to rent a book you were still forced to use hardcopy books．Until now that is, Amazon．com recently announced the start of a new program where you can rent eBooks．
Where to rent eBooks？
As mentioned before，Amazon．com is the first and currently the only retailer (零售商) that has a program in place for renting eBooks． Luckily，Amazon is the largest online retailer in the world and their eBook assortment (分类) is massive．They are also the producer of the Kindle，the most popular Reader，which means you can be sure that the eBooks you rent will work．
You can currently only rent Textbooks．But this is likely to change as soon as word gets out that you can save money by renting eBooks.
Why rent eBooks at Amazon?
* Save money：Save up to 80% of the normal price of the eBook．
* Decide how long you rent：From 30 days to 360 days，you decide how long you want it．You can extend the time by as little as a day．Or simply buy the eBook if you want to keep it after all．
*Use any device：If you rent an eBook from Amazon，you can read it on your PC，Mac，iPad，iPhone，Android device，Windows Phone 7．Blackberry．or Kindle．
* Keep your notes：Do you like to keep annotations (注释) and highlights in your eBooks？Don't worry．You can always revisit your notes and highlights through Amazon．com．
How to rent eBooks？
Simply search for the eBook you want to rent on Amazon．com and select the "Rent eBooks" option. After that，a new page will open where you can select how long you'd like to rent the eBook．You can read eBooks for a period of 30 to 360 days．
You decide how long you need the eBook．If you later find out you need it for longer, you can simply extend the time．Or buy it for the normal price whenever you want.
Once you've chosen the time you want to rent the eBook，you simply go to checkout．Or you can use the "Rent now" button．
2.单选题- (共2题)
| A．元电荷实质上是指电子和质子本身 |
| B．把1.6×10－19 C的电荷量叫元电荷 |
| C．所有带电体的电荷量一定等于元电荷的整数倍 |
| D．带电体间的距离比它们本身的大小大得多，以至于带电体的形状大小和电荷分布对它们间的相互作用力的影响可忽略不计时，带电体就可以视为点电荷 |
A. q1、q2都是正电荷，且q1＞q2
B. q1是正电荷，q2是负电荷，且q1＜|q2|
C. q1是负电荷，q2是正电荷，且|q1|＞q2
D. q1、q2都是负电荷，且|q1|＜|q2|
3.多选题- (共1题)
| A．场强相同处，电势也一定相同；电势相同处，场强也一定相同 |
| B．场强相同处，电势不一定相同；电势相同处，场强不一定相同 |
| C．电场中场强为零的区域，电势处处相同 |
| D．电场中电势相同的位置，场强一定为零 |
4.解答题- (共2题)
（1）求AB两点间的电势差、AC两点间的电势差
（2）若将此电荷从A点移动到无穷远处，克服电场力做功为6×10-4J，求电荷在A点的电势。（设无穷远电势为零）
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【1】题量占比
选择题:(2道)
单选题:(2道)
多选题:(1道)
解答题:(2道)
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【2】：难度分析
1星难题：0
2星难题：0
3星难题：0
4星难题：0
5星难题：0
6星难题：3
7星难题：0
8星难题：2
9星难题：0