图中画出了某一个电场的一些电场线，将一个正电荷q置于该电场中，下面的说法正确的是( )
A．电场线所表示的电场方向是自左向右的
B．电场线所表示的电场方向是自右向左的
C．正电荷q受电场力方向是自左向右的
D．正电荷q受电场力方向是自右向左的
AC
题目分析：根据图中画出的电场线可知，该电场是匀强电场，匀强电场的电场线是一组间距相等的平行线，箭头方向表示电场的方向。
A、匀强电场场强处处相同，有图可知，电场线所表示的电场方向是自左向右的，A选项正确
B、理由同A选项，B选项错误
C、正电荷受到的电场力方向与该处的电场线方向相同，所以C选项正确
D、理由同C选项，D选项错误
故选AC
点评：容易题，匀强电场电场的特点：1．匀强电场的电场线是间距相等互相平行的直线2．带电粒子在匀强电场中受到恒定外力的作用.
What is the hottest topic at your school recently? In Hangzhou Yongjin Middle School, it’s money. The school held an activity called “making money” last weekend. About 200 students of Senior 1 and Senior 2 were divided into 30 teams. They went out to make money by selling things. What did they choose to sell? Some sold newspapers; some chose bottled water; some sold environmentally friendly shopping bags and bamboo(竹子) baskets. Hu Qing’s team decided to sell some useful books in front of the Children Activity Center. They thought parents would like to buy the books for their children. But unfortunately, they met urban management officers (城管). The officers asked them to leave. “We played hide-and-seek (捉迷藏) with the officers for the whole morning” said Hu. “Finally we had to give up.” Wang Bing and her team sold ice cream in a square. They didn’t meet any officers. But few people were interested in what they were selling. The team then put up a board saying “For Country Kids”. It worked. More people came to their stall (小摊). A foreigner even gave them 100 yuan. “He didn’t want any change. He said he wanted to help the children,” said Wang. “We were touched.” Later that day they gave the 100 yuan and more to the “Project Hope” office. Meng Zhaoxiang and his team were luckier. They sold all their cakes in four hours, spending 39.5 yuan and getting back 80 yuan. They made 40.5 yuan. “It was not easy to make the money,” said Meng. “Some people just looked. Others just tasted but didn’t buy. Now I know how hard it is for our parents to make money.” 86. 小题1:In Hangzhou Yongjin Middle School, what the students talk more about is ________.
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