Hi! I'm Linda. I am ____ English girl. Now I'm in Shanghai with my parents. There is a ____ store next to my house. ____ name is Xingxing Clothes Store. You can buy all kinds of ____ in it. They have sweaters at a very good ____. Do you need bags? They ____ great bags for 26yuan each. They have hats ____ red, black and yellow. They ____ have nice skirts for girls. For ____, they have shorts and sports socks. Do you ____ to come here? Let's have a look this afternoon.

曾经震惊世界的日本水俣病是人误吃了被甲基汞污染的鱼所引起的．经检测，水俣湾海水中甲基汞含量最高为0.00017mg/L．设当地海水中生活着A、B、C、D四种生物，由于海水被污染，生物体内残存甲基汞的含量如下表所示：

请分析表中信息，并回答问题：

（1）将101111011_（2）转化为十进制的数；

（2）将53_（8）转化为二进制的数．