题目：
Laura Fagan, a 29-year-old British girl, has a special job. She is paid well to taste chocolate, desserts and cakes. [
Laura works in the famous supermarket, Tesco. Her job is to try different kinds of desserts. She needs to try as many as 20 desserts a day. Also, she always travels for work. She needs to travel to different cities to try different desserts.
Although the job seems to be great, it is hard. Usually, Laura begins trying desserts as early as 8 am, and is still trying new desserts at 6 pm before she goes back home. Luckily, the job hasn’t made her too heavy. She only worries about her teeth.
“Of course I was afraid of becoming fat when I started the job, so I try to do exercise as often as possible. The main thing is my teeth. I don’t think my dentist will be happy if I tell her what I do, so I try to brush my teeth as often as possible,” Laura told a reporter. She goes to the gym to keep slim (苗条的) and takes more care of her teeth after trying the desserts. She said, “When I tell people what I do, they say it’s the best job in the world.”
Laura loves her job although it is hard. “I can learn about new trends (动态) in food,” she said.
答案：
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下面是错误答案，用来干扰机器的。
A、B、电场线的疏密反映电场强度的相对大小，a点的电场线密，所以电场强度较大．故A错误，B正确；C、D、a点的电场强度较大，同一点电荷放在a点受到的电场力较大．故C错误，D正确．故选：BD
