依据“陶片放逐法”，雅典公民大会每年可以放逐一位政治领袖，投票时只要在陶片上刻上名字即可，不问过失，也不问罪行，只要获得票数超过六千，即遭放逐。由此可见该方式（  ）

    Good morning! I'm Bob. This is my house(房子). Look at my sitting room(客厅). The red sofa( 沙发) is very cool, right? In my bedroom(卧室)，there is a computer. I often play computer games on it. Do you like it, too? There is a book and a pencil box on a desk. There is a flower near the sofa. On the wall you can see a picture. It's blue. It's my favourite colour.

    This is my house. What about your house?

已知函数f（x）=e^x﹣ax（a为常数）的图象与y轴交于点A，曲线y=f（x）在点A处的切线斜率为﹣1．